Cell history for students
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- In 1665, Robert Hooke discovered cells in cork and coined the term "cell" from the Latin word "cellula" meaning small compartment. He published his findings in Micrographia. - In 1674, Anton van Leeuwenhoek observed red blood cells, sperm, bacteria and single-celled organisms using his improved microscope. - In 1839, Theodor Schwann and Matthias Schleiden established the cell theory - that all living things are composed of cells, all cells come from preexisting cells, and the cell is the basic unit of structure and function in living things.
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3. There are two main types of cells - prokaryotic cells like bacteria which lack a nucleus, and eukaryotic cells which make up plants, animals, fungi and protists and have
Week 1 gen bio ppt
This document provides an overview of cell biology, including:
- An introduction describing cells as the building blocks of living organisms.
- A timeline of cell theory developed by scientists like Hooke, van Leeuwenhoek, Schleiden, and Schwann.
- Descriptions of prokaryotic and eukaryotic cell structures and organelles like the cell membrane, nucleus, mitochondria, Golgi apparatus, and lysosomes.
- Explanations of the functions of these organelles like transport and packaging by the Golgi apparatus and waste breakdown by lysosomes.
Unit 2 Characteristics of cells lesson week 7and 8.pptx
The document outlines 8 characteristics of life and discusses the structure and function of cells. It notes that all living things are made of cells, which are the basic units of structure and function. Cells come in two main types - prokaryotic cells that lack a nucleus and organelles, and eukaryotic cells that have a nucleus and organelles like mitochondria and chloroplasts. The document also describes the key parts of the cell like the cell membrane, nucleus, mitochondria and how different cell types are specialized for their functions.
Cellular basis of life
The document summarizes the history and development of the cell theory. It describes Robert Hooke's initial observation of cells in 1665 and later contributions from Schwann, Schleiden, and Virchow that led to the modern cell theory. 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 also provides details about key parts of prokaryotic and eukaryotic cells.
Chapter 2- Cells
This document provides an overview of cells, their history and components. It discusses that cells are the basic unit of life, and can be single-celled or multi-celled. It describes the key parts of animal and plant cells including the cell membrane, nucleus, mitochondria and chloroplasts. It also discusses different cell types, tissues, organs and organ systems and how cells are organized in living things. Microscopes are introduced as a tool to study cells. Viruses are defined as needing a host cell to survive and able to infect all living things.
Ch. 7 life is cellular By Hamdy Karim.
Students will be able to answer the questions;
1. What is the cell theory?
2. What are the types of microscopes?
3. What are the differences between prokaryotes and
eukaryotes?
4. What is the cell specialization and organization?
5. How do substances pass through cells?
Cells and the Cell Theory56576778786.pptx
1. The document discusses the history and development of the cell theory by scientists like Hooke, Leeuwenhoek, Schwann, Schleiden, and Virchow.
2. The cell 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.
3. The document compares prokaryotic and eukaryotic cells, describing key differences in their structures like nuclei and organelles. It provides examples of bacterial and plant/animal cells.
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.
Anatomy and Physiology Cell organelles
The document discusses the basic structure and functions of cells. It describes the key components of cells, including the plasma membrane, nucleus, mitochondria, chloroplasts, cell wall, and other organelles. The document also explains the differences between prokaryotic and eukaryotic cells and how scientists first discovered and studied cells using early microscopes.
Lecture 2
Here are the definitions and functions of the requested cellular components:
a. Chloroplast - Organelle found in plant cells where photosynthesis occurs. It contains chlorophyll.
b. Mitochondrion - Organelle where cellular respiration occurs, extracting energy from food through the process of respiration.
c. Nucleus - Control center of the cell that contains the genetic material DNA and directs cell activities.
d. Protoplasm - Living contents of the cell, consisting of the cytoplasm and organelles outside the nucleus.
e. Endoplasmic reticulum - Network of membranes that synthesize proteins and lipids and transport materials within the cell.
[Here is a labeled diagram of the cell
Chapter 1 cell review
The document summarizes key information about cells and cellular life. It states that all living things are made of cells, which are the basic functional units of life that come from pre-existing cells. It describes the cell theory that cells are the fundamental unit of structure and organization in living things. The document outlines the characteristics of prokaryotic and eukaryotic cells and explains how organisms can be classified by their cell type.
Cells 2013 14
The cell is the basic unit of all living things. Cells contain organelles that allow them to carry out life functions like respiration, protein production, and waste removal. Plant and animal cells differ in structures like the presence of a cell wall and chloroplasts in plant cells. Cells come together to form multicellular organisms through different levels of organization - tissues, organs, organ systems - allowing complex life forms to develop, function and reproduce.
ppt from cells to organsimsms
This document provides an overview of cells, their structures, and their functions. It discusses the cell theory, which 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. It describes the key organelles in plant and animal cells, including the cell membrane, nucleus, mitochondria, chloroplasts, vacuoles, and lysosomes. It explains how cells carry out important processes like metabolism, respiration, diffusion, and osmosis. The document also discusses how cells specialize and organize into tissues, organs, organ systems, and whole organisms.
The Fundamental Unit Of Life.pptx
Thank you for the detailed document on cell structure and function. I learned a lot!
IB Biology 1.1 Slides: Introduction to Cells
1. Cells are the basic unit of all living things. Robert Hooke first observed cells in 1665 using a microscope. The cell theory states that all living things are made of cells, cells come only from pre-existing cells, and cells contain the basic components necessary for life.
2. Cells vary in size but have limitations based on their surface area to volume ratio. As cells increase in size, their ability to exchange materials decreases. Multicellular organisms overcome this through specialized tissues, organs and circulatory systems.
3. Cells carry out the basic functions of life including metabolism, reproduction, homeostasis, growth, response to stimuli, waste removal and nutrition. Unicellular organisms carry out all life functions
Cell The Unit of Life- 1
1. Cells are the basic unit of life and all organisms are composed of one or more cells. Some organisms like bacteria are unicellular while others like humans are multicellular.
2. The earliest observations of cells were made by Robert Hooke in 1665 and key discoveries were later made by Robert Brown, Theodor Schwann, Mattias Schleiden, and Rudolf Virchow establishing cells as the fundamental unit of life.
3. There are two main types of cells - eukaryotic cells with a nucleus and organelles, and prokaryotic cells without a nucleus. Eukaryotic cells can be single-celled or part of multicellular organisms.
GEN BIO LAS 1 TONI JEAN MANABAT.pdf
It presents the history of the Earth through geologic time. It discusses the earth's structure, composition, and processes. Issues, concerns, and problems pertaining to natural hazards are also included. It also deals with the basic principles and processes in the study of biology.
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Cells and the Cell Theory.pptx University of benghazi
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Unit 2 Characteristics of cells lesson week 7and 8.pptx
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Cell history for students
- 3. 1665- Robert Hooke (English) discovered cells in a piece of cork drew the cells he saw and also coined the word CELL.
- 4. 1665- Robert Hooke (English) cell is derived from the Latin word 'cellula‘ - means small compartment. published his findings in his famous work, Micrographia
- 5. 1674- Anton Van Leeuwenhoek (Dutch) made single lens microscope that magnify objects 200x observed red blood cells, spermatozoa, bacteria and single celled organisms in pond water
- 6. 1824- René Henri Dutrochet (French) discovered that the cell is the fundamental element in the structure of living bodies, forming both animals and plants through juxtaposition.
- 7. 1824- René Henri Dutrochet (French) Juxtaposition is the state of being placed or situated side by side. suggested that the various parts of organisms are
- 8. 1831- Robert Brown (Scottish) discovered that cells contain a nucleus. Nucleus is a membrane- bound organelle found in eukaryotic cells. It is the control center of the cell.
- 9. 1835- Felix Dujardin (French) reported that cells are not hollow structure but they are filled with a thick jelly like fluid internal substance- sarcode
- 10. 1838- Matthias Schleiden (German) concluded that all plants are composed of cells and that cells are alive and contribute to the functioning of the organism of which they are part
- 11. 1839- Theodore Schwann (German) stated that all animals are composed of cells.
- 12. 1839- Jan Evangelista Purkinje (Bohemian) investigated the fluid material in the cell naming it Protoplasm
- 13. 1858- Rudolph Virchow (German) stated that all cells came from other living cells “Life is an unbroken chain of cells going all the way back to the first living thing.”
- 14. Cell Theory 1.All living things are composed of cells. 2.All living cells come from other living cells. 3.Cells are the basic unit of life.
- 15. a. nutrition b. digestion c. absorption d. biosynthesis e. excretion f. egestion
- 16. g. movement h. irritability i. secretion j. respiration k. reproduction
- 17. Cell Functions • Nutrition- cells obtain food molecules to support their other activities. • Digestion- food particles are broken down into smaller units • Absorption- cells absorb from their environment, water, minerals, and other materials essential for life. • Biosynthesis- all cells organize complex molecules from simple building units or substances. • Egestion- insoluble, nondigested particles are eliminated by the cell
- 18. • Excretion- by-products of all cells which are not needed for cell functioning are eliminated. • Secretion- substances that are synthesized by the cells are expelled from the membrane. • Movement- includes the locomotion of cells. • Irritability- cells respond to external factors around them. • Respiration- breaking down food molecules into chemical energy needed by all cells in order to function. • Reproduction- a cell copies its DNA and increases its number by cell division.
- 24. Cell Part Prokaryotic Cell Plant Cell Animal Cell Cell membrane present present present Cell wall present present absent Nucleus absent present present Chromosome Small, circular; single continous loop multiple, large lines multiple, large lines Ribosomes smaller larger larger Organelles absent present present Chlorophyll If present not contained in chloroplast present absent Cytoskeleton absent present present Vacuoles absent large Small Lysosomes absent rare common
Editor's Notes
- suggested that the various parts of organisms are composed of cells.