Cell Theory
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The document discusses cell theory, which has three main tenets: 1) All organisms are composed of one or more cells, 2) The cell is the basic unit of life, and 3) All cells come from preexisting cells. It describes the early discoveries of cells by Hooke, van Leuwenhoek, Schleiden, and Schwann that led to the development of cell theory. It also briefly explains different types of microscopes used to study cells, such as compound, scanning electron, and transmission electron microscopes.
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Cell theory
The document discusses the development of cell theory and the scientists who contributed to it. Anton van Leeuwenhoek invented the compound microscope and was the first to observe cells. Robert Hooke coined the term "cell" after observing cork cells. Matthias Schlieden and Theodor Schwann discovered that plants and animals are made of cells, respectively. Rudolf Virchow established that cells only come from pre-existing cells, which became a tenet of cell theory along with cells being the basic unit of structure and function. Francesco Redi and Louis Pasteur also made discoveries that supported the germ theory of disease.
Cell theory
The cell theory states that (1) the cell is the basic unit of life, (2) all living things are made of cells, and (3) cells come from pre-existing cells. Key scientists who contributed to the development of the cell theory include Anton van Leeuwenhoek who first observed bacteria and cells under a microscope, Robert Hooke who observed "cells" in cork, Theodor Schwann and Matthais Schleiden who stated that all living things are made of cells, and Rudolph Virchow who discovered that all cells come from pre-existing cells.
Cell Theory
The Cell Theory states that (1) all living things are made of cells, (2) cells are the basic units of structure and function in living things, and (3) all cells come from other cells. This theory was developed from the scientific discoveries of several scientists between 1663-1855, including Hooke, Leeuwenhoek, Schleiden, Schwann, and Virchow, who observed that plants and animals are made of cells and that cells reproduce through dividing.
Cell theory
The development of the cell theory involved contributions from several scientists using microscopes. Robert Hooke first observed cells when examining cork through a microscope in 1665 and coined the term "cell". Anton van Leeuwenhoek later discovered single-celled organisms which he called "animalcules" while examining pond water with a microscope. In the 1830s, Matthias Schleiden and Theodor Schwann concluded that plants and animals, respectively, are composed of cells. Their work established that cells are the fundamental unit of all living things.
1. cell theory
The document discusses the early discoveries around cell theory. It describes several scientists' contributions: Robert Hooke observed tiny compartments in cork under a microscope in 1665 and named them cells. Anton van Leeuwenhoek later observed red blood cells, sperm cells, and single-celled organisms using microscopes. Robert Brown discovered the cell nucleus in 1831 and studied Brownian motion. Matthias Schleiden stated in 1838 that plants are composed of cells, while Theodor Schwann later concluded the same for animals. Their joint work formed the basis of the first cell theory - that all living things are composed of one or more cells.
Unit 3 - 7.1 Cell Discovery and Theory
The microscope enabled the discovery that all living things are made of cells. In 1665, Robert Hooke used a simple microscope to observe box-shaped structures in cork that he called "cells". In the late 1600s, Anton van Leeuwenhoek used an improved microscope to observe living organisms in pond water and milk. Over subsequent decades, scientists including Matthias Schleiden, Theodor Schwann, and Rudolf Virchow contributed observations that led to the accepted Cell Theory - that all living things are composed of cells, cells are the basic unit of structure, and cells come from pre-existing cells. More advanced microscopes like electron microscopes have since allowed scientists to study cells in even greater detail.
Cell discovery & cell theory
The document discusses the history and key figures in the discovery and establishment of the cell theory. It notes that cells were first observed in the 1600s using early microscopes. Key contributors included Hooke, who first observed cells in cork in 1665 and coined the term "cell", and van Leeuwenhoek who observed single-celled organisms in pond water in the 1670s. In the 1830s, Schleiden and Schwann established that plants and animals are composed of cells, respectively, and Schwann proposed the original cell theory. Virchow later expanded on this in 1858 by stating that all cells come from pre-existing cells.
Cell Theory
1. The cell theory states that the cell is the basic unit of life, all living things are made of cells, and cells come from pre-existing cells.
2. Anton van Leeuwenhoek invented the first microscope and was the first to observe bacteria and protists. Matthais Schleiden and Theodor Schwann contributed to the cell theory by stating that plants and animals are made of cells, respectively.
3. Rudolph Virchow completed the cell theory by discovering that cells can only arise from pre-existing cells.
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Cell theory
The document discusses the development of cell theory and the scientists who contributed to it. Anton van Leeuwenhoek invented the compound microscope and was the first to observe cells. Robert Hooke coined the term "cell" after observing cork cells. Matthias Schlieden and Theodor Schwann discovered that plants and animals are made of cells, respectively. Rudolf Virchow established that cells only come from pre-existing cells, which became a tenet of cell theory along with cells being the basic unit of structure and function. Francesco Redi and Louis Pasteur also made discoveries that supported the germ theory of disease.
Cell theory
The cell theory states that (1) the cell is the basic unit of life, (2) all living things are made of cells, and (3) cells come from pre-existing cells. Key scientists who contributed to the development of the cell theory include Anton van Leeuwenhoek who first observed bacteria and cells under a microscope, Robert Hooke who observed "cells" in cork, Theodor Schwann and Matthais Schleiden who stated that all living things are made of cells, and Rudolph Virchow who discovered that all cells come from pre-existing cells.
Cell Theory
The Cell Theory states that (1) all living things are made of cells, (2) cells are the basic units of structure and function in living things, and (3) all cells come from other cells. This theory was developed from the scientific discoveries of several scientists between 1663-1855, including Hooke, Leeuwenhoek, Schleiden, Schwann, and Virchow, who observed that plants and animals are made of cells and that cells reproduce through dividing.
Cell theory
The development of the cell theory involved contributions from several scientists using microscopes. Robert Hooke first observed cells when examining cork through a microscope in 1665 and coined the term "cell". Anton van Leeuwenhoek later discovered single-celled organisms which he called "animalcules" while examining pond water with a microscope. In the 1830s, Matthias Schleiden and Theodor Schwann concluded that plants and animals, respectively, are composed of cells. Their work established that cells are the fundamental unit of all living things.
1. cell theory
The document discusses the early discoveries around cell theory. It describes several scientists' contributions: Robert Hooke observed tiny compartments in cork under a microscope in 1665 and named them cells. Anton van Leeuwenhoek later observed red blood cells, sperm cells, and single-celled organisms using microscopes. Robert Brown discovered the cell nucleus in 1831 and studied Brownian motion. Matthias Schleiden stated in 1838 that plants are composed of cells, while Theodor Schwann later concluded the same for animals. Their joint work formed the basis of the first cell theory - that all living things are composed of one or more cells.
Unit 3 - 7.1 Cell Discovery and Theory
The microscope enabled the discovery that all living things are made of cells. In 1665, Robert Hooke used a simple microscope to observe box-shaped structures in cork that he called "cells". In the late 1600s, Anton van Leeuwenhoek used an improved microscope to observe living organisms in pond water and milk. Over subsequent decades, scientists including Matthias Schleiden, Theodor Schwann, and Rudolf Virchow contributed observations that led to the accepted Cell Theory - that all living things are composed of cells, cells are the basic unit of structure, and cells come from pre-existing cells. More advanced microscopes like electron microscopes have since allowed scientists to study cells in even greater detail.
Cell discovery & cell theory
The document discusses the history and key figures in the discovery and establishment of the cell theory. It notes that cells were first observed in the 1600s using early microscopes. Key contributors included Hooke, who first observed cells in cork in 1665 and coined the term "cell", and van Leeuwenhoek who observed single-celled organisms in pond water in the 1670s. In the 1830s, Schleiden and Schwann established that plants and animals are composed of cells, respectively, and Schwann proposed the original cell theory. Virchow later expanded on this in 1858 by stating that all cells come from pre-existing cells.
Cell Theory
1. The cell theory states that the cell is the basic unit of life, all living things are made of cells, and cells come from pre-existing cells.
2. Anton van Leeuwenhoek invented the first microscope and was the first to observe bacteria and protists. Matthais Schleiden and Theodor Schwann contributed to the cell theory by stating that plants and animals are made of cells, respectively.
3. Rudolph Virchow completed the cell theory by discovering that cells can only arise from pre-existing cells.
Cell theory
- In the 1600s, Robert Hooke observed "cells" under a microscope when examining cork and coined the term. Anton van Leeuwenhoek then described living cells from pond water in the 1670s.
- Scientists originally believed in the theory of spontaneous generation, that life could arise from non-living things like dust or decaying meat, until experiments by Francesco Redi and Louis Pasteur disproved this.
- Pasteur's experiments with swan neck flasks in the 1800s demonstrated that life only arises from other living cells, providing support for the cell theory that all living things are made of cells, cells come only from other cells, and cells perform functions necessary to sustain life
The cell theory and the microscopes 4º ESO IES Pedro de Luna -ZARAGOZA
The cell theory and the microscopes 4º ESO IES Pedro de Luna -ZARAGOZAbiologia, geologia , poesía , vida,
By: Marina Járboles, Cristina Alierta and Pilar Ballesteros.
CELL
Cell Theory
Cell scientists
1) Robert Hooke
2) Antony Van Leeuwenhoek
3) Robert Brown
4) Mattias Schleiden
5) Theodor Schwann
6) Rudolph Virchow
History of microscopes
Types of microscopes
Optical and electron microscopes.
Cell Theory - Early History
Anton van Leeuwenhoek and Robert Hooke were early pioneers in microscopy who made important discoveries about cells. Matthias Schleiden, Theodor Schwann, and Rudolph Virchow contributed to the development of the Cell Theory, which states that all living things are made of cells, cells are the basic units of structure and function, and cells only come from preexisting cells. Their combined work in microscopy and cell observation laid the foundation for understanding biology at the cellular level.
Cell Theory
The document discusses cell theory and its historical development. Cell theory states that all living things are made of cells, cells perform all life functions, and new cells come from existing cells. Cells make up the basic level of organization and combine to form higher levels like tissues, organs, and full bodies. An upcoming quiz will cover cell organelles, microscopes, cell theory, and movement through membranes using material from Chapter 7 in the textbook and self-test questions.
Cell theory notes 7th
The document discusses Cell Theory, which states that (1) the cell is the smallest unit of life, (2) all cells come from preexisting cells, and (3) all organisms are made up of one or more cells. It also notes that major discoveries discussed in the video included the observation of bacteria in teeth, cells in cork that resembled rooms, and that plants and animals are made of cells. These discoveries were made possible by the microscope.
Cell Theory
The document outlines the development of the Cell Theory from early microscope observations of plant and animal tissues in the late 1500s through the mid-1800s. It describes the key contributions of Hooke, Leeuwenhoek, Brown, Schleiden, Schwann, and Virchow that ultimately led to the three main principles of the Cell Theory: that all living things are made of cells, cells are the basic functional units of life, and new cells arise from existing cells.
Early Discoveries of Cells thru Timeline
Early Discoveries of Cells thru Timeline
presented by Teacher Kiel Lorrence Garcia
Note the following information and perform the necessary tasks such as reading assigns and homework activity that are due next week September 4 to 9, 2011
The history of cells and cell theory
The document summarizes the history and development of cell theory. It discusses key figures such as Hooke, who first observed and named cells in 1665; Van Leeuwenhoek, who observed the first living cells in 1683; and Schleiden, Schwann, and Virchow, who developed the three principles of cell theory - that all living things are made of cells, cells are the basic unit of life, and new cells are produced from existing cells. The document also describes the basic structures and differences between prokaryotic and eukaryotic cell types.
4
The document discusses the key characteristics of cells. It explains that cells were first discovered after the invention of the microscope in the 1600s. It then discusses early scientists like Robert Hooke, Anton van Leeuwenhoek, Matthias Schleiden, and Theodor Schwann and their contributions to cell discovery and the formulation of the cell theory. The cell theory states that all organisms are made up of cells, cells are the basic unit of life, and all cells come from preexisting cells. The document also outlines the basic components of cells like the cell membrane, cytoplasm, organelles, and genetic material.
Cell and Molecular Biology: Definitions theory and basics, History and Applic...
This document provides an overview of cell and molecular biology. It defines cells as the basic structural and functional units of life and describes their components and characteristics. The development of cell theory by Hooke, Leeuwenhoek, Schleiden, Schwann, and Virchow is summarized. Molecular biology is introduced as the study of gene structure and function at the molecular level, involving DNA, RNA, proteins, and their interactions. Common techniques used in molecular biology like PCR and DNA sequencing are listed.
10. cell division
The document discusses cell division and the cell cycle. It describes the stages of interphase where the cell prepares for division. These stages are G1, S phase where DNA replicates, and G2. Mitosis is then described in its four stages: prophase, metaphase, anaphase and telophase. Cytokinesis, the final stage of cell division, is different between plant and animal cells. Factors involved in cell cycle control and cancer development are also mentioned.
Life Is Cellular
Cells are the basic structural and functional units of life. In the 17th-18th centuries, advances in microscope technology allowed scientists like Hooke and van Leeuwenhoek to observe cells. In 1838, Schleiden and Schwann proposed the Cell Theory - that all living things are composed of cells, cells are the basic unit of structure and function, and new cells are produced from existing cells. The Cell Theory was a major unifying concept in biology and changed views of life by introducing a more materialistic, reductionist perspective.
The cell theory
1. The document discusses the development of the Cell Theory from early observations of cells in the 1600s to its modern understanding.
2. Key figures who contributed include Hooke, van Leuwenhoek, Schleiden, Schwann, and Virchow, with their combined work establishing the basic principles of the Cell Theory.
3. The modern Cell Theory expanded on the original statements and includes that cells contain DNA, have similar chemical compositions, perform basic functions, and depend on organelle activities.
The cell theory
The document outlines the history and development of the cell theory. It discusses early discoveries of cells in the 1600s by Hooke and Leuwenhoek. The cell theory was then developed between 1838-1858 by Schleiden, Schwann, and Virchow, establishing that all organisms are composed of cells, cells are the basic unit of life, and cells only come from preexisting cells. The modern cell theory adds that cells contain DNA, have similar chemical composition and functions, and their activity depends on internal structures. The cell theory is now fundamental to medicine, health research, and understanding that humans are communities of living cells.
The Cell theory
This presentation you will get how the cell theory developed.
Robert Hooke observed cells in cork and coined the term "cells”.
Anton Van Leeuwenhoek observed first living cells under the simple microscope.
Matthias Schleiden (1838) German lawyer turned botanist, concluded that, despite differences in the structure of various tissues, plants were made of cells and that the plant embryo arose from a single cell.
In 1839, Theodor Schwann, a German zoologist and colleague of Schleiden’s, published a comprehensive report on the cellular basis of animal life. Schwann concluded that the cells of plants and animals are similar structures.
By 1855, Rudolf Virchow, a German pathologist concluded that
“Omnis cellula e cellula”- new cells are formed only from pre-existing cells.
All organisms are composed of one or more cells.
2) The cell is the structural unit of life.
3) Cells can arise only by division from a pre-existing cell
1. cell theory
1. Cell theory states that all living things are composed of cells, cells are the basic unit of structure and function in living things, and cells only arise from pre-existing cells through cell division.
2. Advances in microscopy technology allowed scientists like Hooke, van Leeuwenhoek, Schleiden and Schwann to observe cells directly and formulate the original cell theory.
3. The development of electron microscopes provided evidence for modern additions to cell theory, including that cells contain hereditary material and have the same basic chemical composition.
Cells
The document discusses the history and development of the cell theory and microscopy. It describes how early scientists like Hooke, Van Leeuwenhoek, Brown, Schleiden, and Schwann made important discoveries using early microscopes that contributed to the formulation of the cell theory. The cell theory states that all living things are made up of cells, cells are the basic unit of structure and function, and cells come from pre-existing cells. The document also provides an overview of different types of microscopes, including optical, electron, transmission, scanning electron, and x-ray microscopes.
Cell theory
A cell is the basic unit of structure and function in living things. The invention of the microscope made it possible to see cells. There are two main types of microscopes - simple microscopes with one lens and compound microscopes with more than one lens. The cell theory states that all living things are made up of cells, cells are the basic unit of structure and function of an organism, and cells are produced from other cells. Robert Hooke was the first to see a cell using a microscope and named it a cell.
Cell discovery and theory
The document summarizes the history of the discovery and development of the cell theory. It describes how:
1) Early microscopists like Leeuwenhoek and Hooke first observed and described cells in the 1650s after inventing microscopes.
2) Scientists like Redi, Spallanzani, and Pasteur conducted experiments throughout the 1600-1800s that disproved the theory of spontaneous generation and supported the idea that cells only come from pre-existing cells.
3) Their work along with the observations of early microscopists led to the development of the cell theory, which states that all living things are made of cells, cells are the basic units of structure
The discovery of cells notes
The document discusses the early discoveries of cells in the 1600s by van Leeuwenhoek and Hooke using early microscopes. They observed "cells" and drew hundreds of examples, with Hooke naming them cells based on their similarities to small monk rooms. This early work led to the development of the Cell Theory which states that all living things are made of cells, cells are the basic unit of structure and function, and cells come from pre-existing cells. The document also describes the two main types of cells - prokaryotes which are bacteria and lack organelles/nucleus, and eukaryotes which are mostly multicellular organisms that have a nucleus and organelles.
2.5 cell division
Cells undergo a cell cycle of growth, DNA replication, and cell division. The cell cycle consists of interphase, mitosis, and cytokinesis. Mitosis produces two daughter cells that are genetically identical to the original parent cell. While plant and animal cells both divide via mitosis, there are differences in how cytokinesis occurs - plant cells form a cell plate, while animal cells pinch in two using a contracting ring of microfilaments.
Mitosis- with an animated explanation of the concept
The document summarizes the stages of mitosis in eukaryotic cell division. It describes the key events of each phase: prophase, metaphase, anaphase, and telophase. Chromosomes condense and spindle fibers form in prophase. In metaphase, chromosomes align at the metaphase plate. Anaphase involves the separation of chromatids to opposite poles. Telophase involves chromosome decondensation and nuclear envelope reformation. Cytokinesis then divides the cytoplasm, completing cell division into two daughter cells. The process of mitosis allows for cell growth, tissue repair, and genetic identicalness between daughter cells.
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Cell theory
- In the 1600s, Robert Hooke observed "cells" under a microscope when examining cork and coined the term. Anton van Leeuwenhoek then described living cells from pond water in the 1670s.
- Scientists originally believed in the theory of spontaneous generation, that life could arise from non-living things like dust or decaying meat, until experiments by Francesco Redi and Louis Pasteur disproved this.
- Pasteur's experiments with swan neck flasks in the 1800s demonstrated that life only arises from other living cells, providing support for the cell theory that all living things are made of cells, cells come only from other cells, and cells perform functions necessary to sustain life
The cell theory and the microscopes 4º ESO IES Pedro de Luna -ZARAGOZA
The cell theory and the microscopes 4º ESO IES Pedro de Luna -ZARAGOZAbiologia, geologia , poesía , vida,
By: Marina Járboles, Cristina Alierta and Pilar Ballesteros.
CELL
Cell Theory
Cell scientists
1) Robert Hooke
2) Antony Van Leeuwenhoek
3) Robert Brown
4) Mattias Schleiden
5) Theodor Schwann
6) Rudolph Virchow
History of microscopes
Types of microscopes
Optical and electron microscopes.
Cell Theory - Early History
Anton van Leeuwenhoek and Robert Hooke were early pioneers in microscopy who made important discoveries about cells. Matthias Schleiden, Theodor Schwann, and Rudolph Virchow contributed to the development of the Cell Theory, which states that all living things are made of cells, cells are the basic units of structure and function, and cells only come from preexisting cells. Their combined work in microscopy and cell observation laid the foundation for understanding biology at the cellular level.
Cell Theory
The document discusses cell theory and its historical development. Cell theory states that all living things are made of cells, cells perform all life functions, and new cells come from existing cells. Cells make up the basic level of organization and combine to form higher levels like tissues, organs, and full bodies. An upcoming quiz will cover cell organelles, microscopes, cell theory, and movement through membranes using material from Chapter 7 in the textbook and self-test questions.
Cell theory notes 7th
The document discusses Cell Theory, which states that (1) the cell is the smallest unit of life, (2) all cells come from preexisting cells, and (3) all organisms are made up of one or more cells. It also notes that major discoveries discussed in the video included the observation of bacteria in teeth, cells in cork that resembled rooms, and that plants and animals are made of cells. These discoveries were made possible by the microscope.
Cell Theory
The document outlines the development of the Cell Theory from early microscope observations of plant and animal tissues in the late 1500s through the mid-1800s. It describes the key contributions of Hooke, Leeuwenhoek, Brown, Schleiden, Schwann, and Virchow that ultimately led to the three main principles of the Cell Theory: that all living things are made of cells, cells are the basic functional units of life, and new cells arise from existing cells.
Early Discoveries of Cells thru Timeline
Early Discoveries of Cells thru Timeline
presented by Teacher Kiel Lorrence Garcia
Note the following information and perform the necessary tasks such as reading assigns and homework activity that are due next week September 4 to 9, 2011
The history of cells and cell theory
The document summarizes the history and development of cell theory. It discusses key figures such as Hooke, who first observed and named cells in 1665; Van Leeuwenhoek, who observed the first living cells in 1683; and Schleiden, Schwann, and Virchow, who developed the three principles of cell theory - that all living things are made of cells, cells are the basic unit of life, and new cells are produced from existing cells. The document also describes the basic structures and differences between prokaryotic and eukaryotic cell types.
4
The document discusses the key characteristics of cells. It explains that cells were first discovered after the invention of the microscope in the 1600s. It then discusses early scientists like Robert Hooke, Anton van Leeuwenhoek, Matthias Schleiden, and Theodor Schwann and their contributions to cell discovery and the formulation of the cell theory. The cell theory states that all organisms are made up of cells, cells are the basic unit of life, and all cells come from preexisting cells. The document also outlines the basic components of cells like the cell membrane, cytoplasm, organelles, and genetic material.
Cell and Molecular Biology: Definitions theory and basics, History and Applic...
This document provides an overview of cell and molecular biology. It defines cells as the basic structural and functional units of life and describes their components and characteristics. The development of cell theory by Hooke, Leeuwenhoek, Schleiden, Schwann, and Virchow is summarized. Molecular biology is introduced as the study of gene structure and function at the molecular level, involving DNA, RNA, proteins, and their interactions. Common techniques used in molecular biology like PCR and DNA sequencing are listed.
10. cell division
The document discusses cell division and the cell cycle. It describes the stages of interphase where the cell prepares for division. These stages are G1, S phase where DNA replicates, and G2. Mitosis is then described in its four stages: prophase, metaphase, anaphase and telophase. Cytokinesis, the final stage of cell division, is different between plant and animal cells. Factors involved in cell cycle control and cancer development are also mentioned.
Life Is Cellular
Cells are the basic structural and functional units of life. In the 17th-18th centuries, advances in microscope technology allowed scientists like Hooke and van Leeuwenhoek to observe cells. In 1838, Schleiden and Schwann proposed the Cell Theory - that all living things are composed of cells, cells are the basic unit of structure and function, and new cells are produced from existing cells. The Cell Theory was a major unifying concept in biology and changed views of life by introducing a more materialistic, reductionist perspective.
The cell theory
1. The document discusses the development of the Cell Theory from early observations of cells in the 1600s to its modern understanding.
2. Key figures who contributed include Hooke, van Leuwenhoek, Schleiden, Schwann, and Virchow, with their combined work establishing the basic principles of the Cell Theory.
3. The modern Cell Theory expanded on the original statements and includes that cells contain DNA, have similar chemical compositions, perform basic functions, and depend on organelle activities.
The cell theory
The document outlines the history and development of the cell theory. It discusses early discoveries of cells in the 1600s by Hooke and Leuwenhoek. The cell theory was then developed between 1838-1858 by Schleiden, Schwann, and Virchow, establishing that all organisms are composed of cells, cells are the basic unit of life, and cells only come from preexisting cells. The modern cell theory adds that cells contain DNA, have similar chemical composition and functions, and their activity depends on internal structures. The cell theory is now fundamental to medicine, health research, and understanding that humans are communities of living cells.
The Cell theory
This presentation you will get how the cell theory developed.
Robert Hooke observed cells in cork and coined the term "cells”.
Anton Van Leeuwenhoek observed first living cells under the simple microscope.
Matthias Schleiden (1838) German lawyer turned botanist, concluded that, despite differences in the structure of various tissues, plants were made of cells and that the plant embryo arose from a single cell.
In 1839, Theodor Schwann, a German zoologist and colleague of Schleiden’s, published a comprehensive report on the cellular basis of animal life. Schwann concluded that the cells of plants and animals are similar structures.
By 1855, Rudolf Virchow, a German pathologist concluded that
“Omnis cellula e cellula”- new cells are formed only from pre-existing cells.
All organisms are composed of one or more cells.
2) The cell is the structural unit of life.
3) Cells can arise only by division from a pre-existing cell
1. cell theory
1. Cell theory states that all living things are composed of cells, cells are the basic unit of structure and function in living things, and cells only arise from pre-existing cells through cell division.
2. Advances in microscopy technology allowed scientists like Hooke, van Leeuwenhoek, Schleiden and Schwann to observe cells directly and formulate the original cell theory.
3. The development of electron microscopes provided evidence for modern additions to cell theory, including that cells contain hereditary material and have the same basic chemical composition.
Cells
The document discusses the history and development of the cell theory and microscopy. It describes how early scientists like Hooke, Van Leeuwenhoek, Brown, Schleiden, and Schwann made important discoveries using early microscopes that contributed to the formulation of the cell theory. The cell theory states that all living things are made up of cells, cells are the basic unit of structure and function, and cells come from pre-existing cells. The document also provides an overview of different types of microscopes, including optical, electron, transmission, scanning electron, and x-ray microscopes.
Cell theory
A cell is the basic unit of structure and function in living things. The invention of the microscope made it possible to see cells. There are two main types of microscopes - simple microscopes with one lens and compound microscopes with more than one lens. The cell theory states that all living things are made up of cells, cells are the basic unit of structure and function of an organism, and cells are produced from other cells. Robert Hooke was the first to see a cell using a microscope and named it a cell.
Cell discovery and theory
The document summarizes the history of the discovery and development of the cell theory. It describes how:
1) Early microscopists like Leeuwenhoek and Hooke first observed and described cells in the 1650s after inventing microscopes.
2) Scientists like Redi, Spallanzani, and Pasteur conducted experiments throughout the 1600-1800s that disproved the theory of spontaneous generation and supported the idea that cells only come from pre-existing cells.
3) Their work along with the observations of early microscopists led to the development of the cell theory, which states that all living things are made of cells, cells are the basic units of structure
The discovery of cells notes
The document discusses the early discoveries of cells in the 1600s by van Leeuwenhoek and Hooke using early microscopes. They observed "cells" and drew hundreds of examples, with Hooke naming them cells based on their similarities to small monk rooms. This early work led to the development of the Cell Theory which states that all living things are made of cells, cells are the basic unit of structure and function, and cells come from pre-existing cells. The document also describes the two main types of cells - prokaryotes which are bacteria and lack organelles/nucleus, and eukaryotes which are mostly multicellular organisms that have a nucleus and organelles.
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The cell theory and the microscopes 4º ESO IES Pedro de Luna -ZARAGOZA
The cell theory and the microscopes 4º ESO IES Pedro de Luna -ZARAGOZA
Cell and Molecular Biology: Definitions theory and basics, History and Applic...
Cell and Molecular Biology: Definitions theory and basics, History and Applic...
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2.5 cell division
Cells undergo a cell cycle of growth, DNA replication, and cell division. The cell cycle consists of interphase, mitosis, and cytokinesis. Mitosis produces two daughter cells that are genetically identical to the original parent cell. While plant and animal cells both divide via mitosis, there are differences in how cytokinesis occurs - plant cells form a cell plate, while animal cells pinch in two using a contracting ring of microfilaments.
Mitosis- with an animated explanation of the concept
The document summarizes the stages of mitosis in eukaryotic cell division. It describes the key events of each phase: prophase, metaphase, anaphase, and telophase. Chromosomes condense and spindle fibers form in prophase. In metaphase, chromosomes align at the metaphase plate. Anaphase involves the separation of chromatids to opposite poles. Telophase involves chromosome decondensation and nuclear envelope reformation. Cytokinesis then divides the cytoplasm, completing cell division into two daughter cells. The process of mitosis allows for cell growth, tissue repair, and genetic identicalness between daughter cells.
Cells
The document summarizes key information about cells:
1. Cells are the basic structural and functional units that make up all living things. All cells come from pre-existing cells through cell division.
2. Important early discoveries in cell biology include Anton van Leeuwenhoek discovering single-celled organisms under a microscope in 1673 and Robert Hooke observing "cells" in cork in 1665.
3. The cell theory, developed in the 1800s by scientists like Schleiden, Schwann, and Virchow, established that all living things are made of cells, cells are the basic units of structure and function, and all cells come from pre-existing cells.
Cell division, a new way.
Cell division is the process by which a parent cell divides into two or more daughter cells. There are two main types of cell division: mitosis and meiosis. Mitosis produces two identical daughter cells during growth and repair of the body. It ensures the genetic makeup remains the same. Meiosis produces gametes with half the number of chromosomes and involves two cell divisions. It results in genetic diversity that is important for sexual reproduction.
Cell Theory and Cell Basics 2014
The document summarizes cell theory, including its origins and key developments. It describes how Robert Hooke first observed cells in 1665 and named them. In 1839, Schwann and Schleiden suggested cells were the basic unit of life. In 1858, Virchow concluded that all cells come from pre-existing cells, completing cell theory. The theory states that all living things are made of cells, cells are the basic functional units of life, and all cells come from pre-existing cells.
CELLS - structure
The document summarizes the history of cell discovery from the 17th century to present day. It describes how Robert Hooke first observed cork cells in 1665 using a microscope and how Antonie van Leeuwenhoek later invented an improved microscope in 1674 that allowed him to discover bacteria. It then outlines the various structures and organelles found within plant and animal cells such as cell walls, chloroplasts, mitochondria, nuclei, and flagella, as well as differences between plant and animal cells.
Cell theory
The document outlines the key contributors to the development of the cell theory. It summarizes the major discoveries of Brown, Dujardin, Kolliker, Leeuwenhoek, Purkinje, Schleiden & Schwann, and Virchow that helped establish that cells are the fundamental unit of life. It then lists the main points of the cell theory: that all living things are made of cells, cells are the basic functional units of life, and cells only arise from preexisting cells through division.
01 cell structures
The document discusses the structures and components of animal and plant cells. It describes the cell theory that all living things are made of cells, which are the basic unit of life that come from pre-existing cells. It then explains key organelles in animal cells like the nucleus that controls the cell, endoplasmic reticulum that modifies proteins, Golgi apparatus that packages cell components, mitochondria that generate energy, and ribosomes that produce proteins. Additional structures in plant cells include a cell wall for protection and chloroplasts for photosynthesis.
Cells: structure
The document provides information about cells including:
1. It summarizes the cell theory which states that cells are the basic units of life, all living things are made of cells, and new cells come from existing cells.
2. It describes the two main types of cells - prokaryotic cells which lack a nucleus and organelles, and eukaryotic cells which have a nucleus and organelles.
3. It details several organelles found in eukaryotic cells and their functions including the nucleus, mitochondria, chloroplasts, endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles.
Unit 3, Lesson 3.3 - The Cell Theory
The document discusses the history and development of the cell theory, beginning with Hooke and Leeuwenhoek's early observations of cells in the 1600s and culminating in the three main points of the modern cell theory - that all living things are made of cells, cells come from pre-existing cells, and cells are the basic unit of life. It also outlines the key contributions of scientists like Schwann, Schleiden, and Virchow that led to the modern understanding that cells are the fundamental building blocks of all living organisms.
Cell Division/Mitosis
Cell division allows organisms to grow and reproduce. All cells come from preexisting cells through asexual or sexual reproduction. In eukaryotic cells, DNA is contained in chromosomes that condense and duplicate before the cell divides. The cell cycle consists of interphase and mitosis, where the cell makes copies of its contents and divides into two daughter cells through cytokinesis. Precise control mechanisms regulate cell division, but errors can lead to uncontrolled growth and cancer.
2.1 Cells
Cells have a cell membrane that encloses the cytoplasm and organelles. The cytoplasm contains a cytoskeleton that maintains the cell's shape. There are two main types of cells - prokaryotic cells which lack membrane-bound structures, and eukaryotic cells which have organelles enclosed in membranes. Organelles such as the nucleus, mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi bodies, vacuoles and lysosomes each have specific functions like processing energy and materials, transporting substances and recycling cellular wastes.
Cells and the cell theory
The document summarizes key aspects of cell theory and cell structure. It discusses scientists like Hooke, Leeuwenhoek, Schwann, and Virchow who contributed to early observations of cells. The cell theory states that all living things are made of cells, the cell is the basic unit of structure and function, and cells only arise from pre-existing cells. The document compares prokaryotic and eukaryotic cells, describing their components like DNA, organelles, and membranes. Key organelles in plant and animal cells are also outlined.
1 cell fernando
3 ESO- Biology bilingual education.
IES Pedro de Luna.
Cell.
Microscope.
Types of cells: Eukaryotic and Procaryotic. Animal and Plant cells.
The organelles ofthe cell and their functions.
www.biodeluna.wordpress.com
Topic 2 Cell theory
The cell theory states that all living things are made of cells, cells are the smallest unit of life, and existing cells come from other cells. Evidence for the cell theory includes observations of organisms under microscopes appearing to be made of cells, Hooke and van Leeuwenhoek's early microscopic observations of cells, cells carrying out functions but components not surviving independently, and all cells undergoing cell division. Unicellular organisms carry out all the functions of life such as metabolism, sensitivity, homeostasis, growth, reproduction, nutrition, and movement within a single cell.
Cell Structure and Function
This document defines cells and describes their basic structures and functions. It explains that cells are the smallest unit capable of life functions and lists examples like amoebas, plant stems, red blood cells, and bacteria. It then describes the structures common to plant and animal cells, including the nucleus that directs the cell, the cell membrane that controls what enters and exits, the cytoplasm where organelles float, and ribosomes that produce proteins. Organelles like mitochondria that produce energy, vacuoles that store materials, and chloroplasts that conduct photosynthesis in plant cells are also outlined. Lastly, diagrams of a typical animal and plant cell are provided.
Cell structure revised
- All living things are composed of cells, which are the basic units of structure and function. The cell theory states that cells come from pre-existing cells through cell division.
- Cells can be prokaryotic, lacking organelles and a nucleus, or eukaryotic, containing organelles and a nucleus. Eukaryotic cells include plant, animal, fungus and protist cells.
- Key structures of eukaryotic cells include a cell membrane, cytoplasm, organelles like the nucleus, mitochondria, chloroplasts, endoplasmic reticulum, Golgi bodies, lysosomes and vacuoles. These structures perform important functions for cellular processes.
Cell theory and structure ppt
1. Cells are the smallest living units that make up all living things. All cells arise from preexisting cells according to cell theory.
2. Eukaryotic cells contain membrane-bound organelles and a nucleus, while prokaryotic cells like bacteria lack these structures. Key organelles include the nucleus, mitochondria, chloroplasts, endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles.
3. Molecules and ions move across the plasma membrane through passive transport mechanisms like diffusion, osmosis, and facilitated diffusion which require no energy, or through active transport which requires energy from processes like the sodium-potassium pump.
2.1, 2.2, 2.3 Cells
- Cell theory states that all living things are made of one or more cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells.
- Evidence for cell theory includes that cells were first observed under microscopes, all organisms show metabolism and homeostasis, and cells can be isolated and grown in culture.
- As cell size increases, surface area to volume ratio decreases, limiting nutrient exchange through the cell's surface. This constrains the maximum size of single-celled organisms.
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Chapter 7 1
The document summarizes the history and development of the cell theory from early microscope observations of cells in the 1600s to the modern principles of the cell theory established in the 1800s. It describes the key scientists who contributed to cell discoveries and theory, including Hooke, van Leeuwenhoek, Schleiden, Schwann, and Virchow. The cell theory states that all living things are made of cells, cells are the basic units of structure and organization, and new cells are produced from existing cells. The document also provides a brief overview of microscope technology and the basic differences between eukaryotic and prokaryotic cells.
Introduction to Cells
This document provides an overview of cells including:
- A brief history of cell discovery from Hooke's first observation of cells in cork in 1665 to Virchow observing cell division in 1855.
- The three statements that make up Cell Theory: all living things are made of cells, new cells are produced from existing cells, and cells are the basic unit of life.
- An introduction to specialized cell types and tissues in multicellular organisms including stem cell differentiation.
- An agenda for an introductory lecture on cells covering guided notes, videos, and assignments.
1__Cell_Theory.pptx
In biology, cell theory is a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.
bio-lesson-6.ppt
This document provides an overview of cell theory and its historical development. It discusses early microscopic observations of cells by Hooke, van Leuwenhoek, Brown, Schleiden, and Schwann that led to the original three postulates of cell theory: 1) All organisms are composed of one or more cells, 2) The cell is the basic unit of life, and 3) All cells come from preexisting cells. Later contributors like Virchow, Schulze, and Mohl added to understanding of cells and their components like DNA and organelles. Modern cell theory now comprises the original three postulates plus statements about DNA inheritance between cells and cells performing basic functions through their internal structures.
Cell History
The document summarizes the history and key discoveries related to cells, including:
1) Robert Hooke was the first to observe cells in 1665 when examining a cork sample under his homemade microscope and described the structures as "little boxes".
2) Anton van Leeuwenhoek later observed microorganisms in pond water in 1673 which he called "animalcules", including some of the first observations of bacteria.
3) In the 1830s-1850s, Matthias Schleiden, Theodore Schwann, and Rudolf Virchow developed the three main principles of the cell theory - that all organisms are made of cells, the cell is the basic unit of living things, and all cells
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The document summarizes the history and key discoveries related to cells, including:
1) Robert Hooke was the first to observe cells in 1665 when examining a cork sample under his homemade microscope and described the structures as "little boxes".
2) Anton van Leeuwenhoek later observed microorganisms in pond water in 1673 which he called "animalcules", including some of the first observations of bacteria.
3) In the 1830s-1850s, Matthias Schleiden, Theodore Schwann, and Rudolf Virchow established the three main principles of the cell theory - that all organisms are made of cells, the cell is the basic unit of living things, and all cells
CVA Biology I - B10vrv3071
- The document discusses the discovery of cells and the development of the cell theory. It describes how early microscopes allowed scientists like Robert Hooke and Anton van Leeuwenhoek to first observe cells. The cell theory states that all living things are made of cells, cells are the basic unit of structure and function, and new cells are produced from existing cells.
- The document then explains different types of microscopes like light microscopes, fluorescence microscopes, transmission electron microscopes, and scanning electron microscopes that have allowed scientists to study cells at different levels of magnification.
- The final sections describe the differences between prokaryotic and eukaryotic cells, noting that prokaryotes lack nuclei while
Aug. 22(intro to cell cell theory)
The document outlines the agenda and objectives for a biology class lesson on cells and cell theory. It discusses key scientists like Hooke, van Leeuwenhoek, Schleiden, and Schwann and their contributions to early microscopy and the eventual formulation of the three principles of cell theory: that all organisms are made of cells, cells are the basic unit of life, and new cells are produced from existing cells. The lesson will include warm-up, learning activities, and a "Name That Guy" game to review the scientists.
A.1 Postulates of the Cell Theory.ppt
The document summarizes the history and key concepts of the cell theory. It describes the early discoveries of cells by Hooke, van Leuwenhoek, Brown and others in the 1600s-1800s. It then outlines the three main postulates of the original cell theory developed by Schleiden, Schwann and Virchow between 1838-1858: 1) All organisms are composed of cells, 2) The cell is the basic unit of life, 3) All cells come from preexisting cells. The document also mentions four components of the modern cell theory and concludes by reflecting on how understanding the cell theory helps explain life at the cellular level.
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The document discusses the history of cell discovery. Robert Hooke first observed cells in 1665 using a microscope to examine cork. Later, Robert Brown discovered the nucleus in 1833. In 1838, Matthias Schleiden and Theodor Schwann discovered that plants and animals respectively are composed of cells. In 1855, Rudolf Virchow proposed that all cells come from preexisting cells, debunking the theory of spontaneous generation. The combined work of these scientists formed the Cell Theory, which states that all living things are composed of cells, cells are the basic unit of life, and all cells come from preexisting cells.
Lecture 1 The Cell.pdf
The document provides information about cell biology and the discovery of cells. It discusses:
1. The cell theory which states that cells are the basic unit of life, arise from preexisting cells, and have similar structure and function.
2. How the first cells were discovered in 1665 by Robert Hooke and 1674 by Anton van Leeuwenhoek using early microscopes.
3. Key developments in microscopy that enabled better visualization of cells, including compound microscopes, light microscopes, transmission electron microscopes, and scanning electron microscopes.
General Biology L1.pptx
The document summarizes the cell theory, which has three main ideas: 1) All organisms are made of cells, 2) All existing cells are produced by other living cells, and 3) The cell is the most basic unit of life. It describes the key contributors to the cell theory from 1665 to 1838, including Robert Hooke, who coined the term "cell"; Anton van Leeuwenhoek, who discovered living cells under a microscope; Matthias Schleiden, who determined that plants are made of cells; Theodor Schwann, who found that animals are also made of cells and published the first statement of the cell theory; and Rudolf Virchow, who stated that cells only come from preexisting
Celltheory and its types
Robert Hooke was the first to observe cells in 1665 when he examined a thin section of cork under a microscope. He saw structures that resembled a honeycomb and called them cells. Later, in 1674, Anton van Leeuwenhoek discovered tiny living things in pond water using a microscope. Over time, the observations of many scientists led to the development of the Cell Theory: (1) all living things are made of cells, (2) cells are the basic units of structure and function, and (3) new cells are produced from existing cells.
introduction to Celltheory
Robert Hooke was the first to observe cells in 1665 when he examined a thin section of cork under a microscope. He saw structures that resembled a honeycomb and called them cells. Later, in 1674, Anton van Leeuwenhoek discovered tiny living things in pond water using a microscope. Over time, the observations of many scientists led to the development of the Cell Theory: (1) all living things are made of cells, (2) cells are the basic units of structure and function, and (3) new cells are produced from existing cells.
History of cell
The document summarizes the history and development of cell theory. It discusses key figures such as Hooke, who first observed and named cells in 1665; Van Leeuwenhoek, who observed the first living cells in 1683; and Schleiden, Schwann, and Virchow, who developed the three principles of cell theory - that all living things are made of cells, cells are the basic unit of life, and new cells are produced from existing cells. The document also describes the basic structures and differences between prokaryotic and eukaryotic cell types.
Cell theory
The document outlines the key discoveries that led to the development of the cell theory. It states that the cell theory proposes that all living things are made up of one or more cells, cells are the basic unit of life, and all cells come from preexisting cells. It identifies the two main types of cells as prokaryotes, which are single-celled organisms without a nucleus, and eukaryotes, which are multicellular organisms that have a nucleus and membrane-bound organelles such as plant and animal cells.
cell.pptx
The basic functional unit of life is the cell. Robert Hooke first observed cells in 1665 when examining a piece of cork under an early microscope. He saw many tiny compartments that reminded him of monk's cells, so he called them cells. Later scientists like Antonie van Leeuwenhoek observed bacteria and other microorganisms using improved microscopes. Over centuries, scientists discovered that cells are the fundamental unit of structure and function for both plants and animals, eventually formulating the cell theory. Today, cells remain the focus of extensive research that has led to advances in fields like stem cell therapy and personalized medicine.
A. The development of the has allowed us to study cells and their pro.pdf
A. The development of the has allowed us to study cells and their processes 1. T a. Resolution is
the ability ofamicroscope to show two objects as separate Magnification is how much larger an
object appears compared to its actual size a Light microscopes are the kind we use in lab. They
function by having visible light pass through an object, and then glass lenses enlarge the object.
b. Electron microscopes use beams of electrons. They have better resolving and magnification
capabilities that allow us to see organelles and their parts. 3. Cell Theory states that all living
things & come from other cells. This theory developed as a result of contributions of 5 people
van Leeuwenhoek- 1 microscope in the 17 century b. Robert Hooke was the first person to use
the term cell to describe the basic structure of living organisms. When observing cork he noticed
that it was full of small room like structures. These structures resembled the cells that monks
lived in thus he coined the term cell in relationship Schleiden-plants are composed ofcells to
living organisms. d Schwann-animals are composed of cells e. Virchow-cells don\'t just appear
they come from preexisting cells. B. Two major classes of cells. which is coiled in region where
the nuc leus would be if the cell had a nucleus. This group includes the archaea and bacteria have
a true nucleus which is bordered by a double membrane called the nuclear enve lop. This group
includes the protists, fungi, plants, and animals collectively known as the Eukarya.
Characteristics of eukaryot ic cells A. Cytoplasm is the space in a cell between the It contains
organelles within a fluid called B. Membrane Structure and Function 1. The serves as the border
of the cell. Its unique structure allows it to regulate what enters and exits a cell, for this reason it
is oft called the gate keeper 2. Membrane Structure pecialized lipids known as make up most of
the membrane. These structures have a or water loving head that is made of a phosphate group
and two x I N
Solution
1. Developmet of microscope enabled the study of cells. Microscopes are two types light or
compound microscope and electronic microscope.
2. In a compound light microscope the high power objective lens comes close to the specimen to
magnify the image. Transmission electron microscopy (TEM) depends on the electron beam of
short wavelength to illuminate the internal structures of microorganisms. The electron beam
penetrates into the specimen and magnifies 1nm object up to 500,000X. In scanning electron
microscopy (SEM) the specimen is coated with a thin layer of heavy metal like gold or
palladium. The narrow beam of electrons probe back and forth of the metal coated specimen.
The secondary electrons that are scattered back give the image of the specimen which is
displayed on the screen.
3. According to cell theory living things are composed of one or more cells. Anton von
Leeuwenhoek (1632-1723) is considered as “Father of Microbiology”. He was the f.
Cell theory By KK Sahu Sir
INTRODUCTION TO CELLS
INTRODUCTION TO CELL THEORY
HISTORY
FORMULATION OF CELL THEORY
CLASSICAL CELL THEORY
DRAWBACKS OF CLASSICAL THEORY
MORDEN CELL THEORY
EXCEPTION OF CELL THEORY
SIGNIFICANCE OF CELL THEORY
HOW HAS THE CELL THEORY BEEN USED
CONCLUSION
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Cell Theory
- 2. Bellringer You will be taking a short test to see what you know at the beginning of the class period. Please make sure you have a pencil Your group should also have a whiteboard, a whiteboard marker, and something to erase with.
- 6. Video- “The Wacky History of Cell Theory”
- 7. Cell theory- what is it? There are 3 basic tenets of cell theory- 1. All organisms are composed of one or more cells. 2. The cell is the basic unit of life in all living things. 3. All cells are produced by the division of preexisting cells.
- 8. “All organisms are composed of one or more cells” All living things are made up of cells! Some organisms are UNICELLULAR- like amoebas. Others are MULTICELLULAR- like plants, animals, and humans.
- 9. “The cell is the basic unit of life in all living things” Every living thing is made of cells.
- 10. “All cells are produced by the division of preexisting cells.” All this means is that cells can only come from other cells. They don’t appear out of nowhere!
- 11. How did we discover cells?
- 12. Robert Hooke (1665) Robert Hooke looked at cork under a very low quality microscope. He called what he saw “cells” because they looked like the cells in a monastery or a prison. He didn’t know WHAT they did or what they were for- and he thought they existed only in plants and fungi
- 14. Anton van Leuwenhoek (1673) Leuwenhoek () used a crude microscope to look at pond scum and discovered single celled organisms that he called “animalcules” He also observed blood cells from many animals
- 15. Nothing big happened until 1838- why? “Spontaneous generation”! Dirty clothing + corn husks = mice?
- 16. The development of cell theory Matthias Schleiden (1838) said “All plants are made of cells” Theodor Schwann (1839) said “All animals are made of cells” The first two tenets of cell theory!
- 17. The development of cell theory Rudolf Virchow spent most of his life studying cells, and in 1858 he declared that cells can only arise from other cells The third tenet of cell theory!
- 18. How do we look at cells?
- 19. 3 different kinds of microscopes Compound microscopes- the kind of microscope you are used to seeing Scanning Electron Microscope (SEM)- creates a 3D image Transmission Electron Microscope (TEM)- looks at very, very small specimens at high magnifications
- 20. Compound microscopes These are called “light” microscopes because they use a light to illuminate the image
- 21. Scanning Electron Microscopes (SEM) SEM microscopes use electrons to image a sample with a beam of light and gives a 3D image Samples are coated in gold and imaged in black and white
- 22. Transmission Electron Microscopes (TEM) Transmission electron microscopes also use electrons, but they can look at very thin or small materials in 2D
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