Idamoeba butschlii and e. nana
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This document discusses the characteristics of Iodamoeba bütschlii, a common intestinal amoeba. When stained, I. bütschlii trophozoites are diagnostic as they have a nucleus with a large central karyosome and little peripheral chromatin. Stained cysts are also diagnostic, showing 4 nuclei with large karyosomes and no peripheral chromatin. I. bütschlii is commonly found at similar frequencies to Entamoeba coli and generally colonizes the colon.
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Ro Practice Section Liver H& E
This document provides an overview of liver tissue structure and function. It describes key features such as hepatocytes arranged in cords separated by sinusoids, central veins, and portal triads. Hepatocytes function to metabolize drugs, store glycogen, and produce bile, as seen with PAS staining. Kupffer cells are located within sinusoids and help remove bacteria and debris from the bloodstream. Practice is needed to learn to identify liver tissue under the microscope based on characteristics such as hepatocyte and sinusoidal arrangement.
Ap Bio Ch 4 PowerPOint
1. The document summarizes key aspects of cell structure and function, including the history of cell discovery, the cell theory, components of eukaryotic and prokaryotic cells, and structures such as organelles, cytoskeleton, flagella, and nuclei.
2. Key organelles discussed include the nucleus, which contains DNA and controls the cell, mitochondria and chloroplasts, which generate energy for the cell, and the endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles, which are involved in transport and storage.
3. Prokaryotic cells are described as generally smaller than eukaryotic cells and lacking membrane-bound organelles and nuclei.
Hematopoiesis: Formation of Blood Cells - An Overview
Hematopoiesis or haemopoiesis is a process of formation of blood cellular components, i.e. formation, development, and differentiation of blood cells, which are derived from haematopoietic stem cells (HSC).
1. fundamental unit
1. The document discusses the fundamental unit of life - the cell. It covers the history of cell discovery from Hooke, Leeuwenhoek, and others. The key aspects of cell theory are presented.
2. Details are provided on the structure and use of the microscope to study cells. The different parts of the compound microscope are identified.
3. The types of cells are defined as prokaryotic and eukaryotic. Differences between plant and animal cells are outlined, including the presence of cell walls, plastids, vacuoles, and other distinguishing characteristics.
tzanck smear.pptx
1. Tzanck smears involve scraping cells from skin lesions and smearing them on a slide for cytological examination. They can help diagnose various conditions like bullous disorders, infections, and cutaneous tumors.
2. In pemphigus vulgaris, Tzanck smears show acantholytic cells and other findings like Sertoli rosettes and streptocytes. Herpes infections show multinucleated syncytial giant cells. Molluscum contagiosum smears reveal characteristic inclusion bodies.
3. Tzanck smears are not always diagnostic but can provide rapid preliminary information and guidance for further histological examination in many skin conditions.
unit 2.pptx
Robert Hooke first observed and coined the term "cell" after viewing cork cells under a microscope. The cell theory states that cells are the smallest unit of life, cells only come from existing cells, and cells are the basic unit of structure and function in living things. Key contributors to the cell theory included Theodor Schwann, Matthais Schleidon, and Rudolf Virchow. The document then discusses various cell organelles like lysosomes, ribosomes, centrioles, vacuoles, and the nucleus.
STRUCTURE AND FUNCTIONS OF NUCLEUS OF A CELL.pptx
The nucleus is the part of a cell that contains DNA organized into chromosomes and is located in the middle of the cell. It is surrounded by the nuclear envelope, which is a double membrane that separates the nucleus from the cytoplasm. The nuclear envelope contains nuclear pores, which are gateways that allow molecules to move into and out of the nucleus.
The Cell: The Histology Guide
Nucleus - The Cell: The Histology Guide - University of Leeds
The nucleus is found in the middle of the cells, and it contains DNA arranged in chromosomes. It is surrounded by the nuclear envelope, a double nuclear membrane (outer and inner), which separates the nucleus from the cytoplasm. The outer membrane is continuous with the rough endoplasmic reticulum.
open.baypath.edu
Nucleus – BIO109 Biology I Introduction to Biology
The boundary of the nucleus, called the nuclear envelope, is a double membrane that contains small openings called nuclear pores. These pores are gateways that allow molecules to move into and out of the nucleus, enabling it to communicate with the rest of the cell.
The nucleus has three main parts:
Nuclear membrane: A protective barrier of the nucleus
Nucleoplasm: The cytoplasm of the nucleus, which is a semifluid matrix that contains chromatin, the less condensed form of DNA that organizes into chromosomes during mitosis or cell division
Nucleolus: A spherical structure that produces and assembles the cell's ribosomes
The nucleus controls and regulates the activities of the cell, such as growth and metabolism.
What are the 4 types of nucleus?
What are the 3 parts of a nucleus?
How many nuclei are in a cell?
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01 cell-and-tissue
The document provides information about cells and tissues. It discusses that cells are the basic structural and functional units of life. It describes the key components of plant and animal cells including the cell membrane, cell wall, nucleus, chloroplasts, mitochondria, vacuoles, and other organelles. It explains that plant cells have a cell wall and chloroplasts while animal cells do not. The document also discusses the different types of tissues including epithelial, connective, muscular and nervous tissue in animals and meristematic and permanent tissues in plants. It provides details about the structure and functions of different cell types and tissues.
Cell Organelles
The document describes the main cell organelles found in eukaryotic cells, including their structures and functions. It notes that the nucleus is the control center that contains DNA, the cell membrane forms the boundary, and the endoplasmic reticulum transports proteins and lipids. Other organelles mentioned are ribosomes for protein synthesis, Golgi apparatus for packaging molecules, mitochondria for energy production, chloroplasts for photosynthesis in plants, vacuoles for storage, and centrioles aiding cell division.
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This document describes the key components of plant cells. It notes that plant cells contain a cell wall, cell membrane, protoplasm, cytoplasm, mitochondria, endoplasmic reticulum, golgi complex, plastids, nucleus, ribosomes, vacuoles, and cytoskeleton. Each of these components serves an important function, such as the cell wall providing structure and protection, the mitochondria producing energy, the nucleus regulating the cell, and the vacuoles storing materials. The document concludes that plant cells were first discovered by Schleiden and that they contain many specialized organelles to carry out their functions.
Squash smear cytology - By Anamika dev
Ssquash smear cytology of CNS, ALgorith to aprroach to squash cytology, new WHO CNS Tumor classification, squash smear preparation
Edible cell
This document summarizes the structure and function of plant cell organelles using food analogies. It describes the nucleus as a doughnut, the nucleolus as a mellow cup inside the doughnut-shaped nucleus, and the nuclear membrane as yellow icing surrounding the nucleus. It also characterizes the cytoplasm as a brownie, chloroplasts as tootsie rolls, mitochondria as twisty twizzlers, and the vacuole as blue icing. Ribosomes are represented by red dots, the endoplasmic reticulum by gummy worms of different textures, and the Golgi apparatus as a folded fruit roll-up. A key matching each organelle to its food analogy is also included.
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Update on Neoplasm of Nervous system in Livestock and their Dignosi
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Hematopoiesis: Formation of Blood Cells - An Overview
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Platelet disorders
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Chlorides
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Idamoeba butschlii and e. nana
- 9. Trophozoites, unstained Not characterictic Trophozoites, stained Diagnostic: nucleus with large central karyosome surrounded by a ring of small chromatin granules; or nucleus structure as in cyst Cysts, unstained Suggestive: large refractile body in cytoplasm; single nucleus Cysts, stained Diagnostic: basket nuclei or nuclei as in trophozoite; large glycogen vacuole
- 10. Iron Hematoxylin stain I.bütschlii trophozoite showing large blotchy karyosome withing nucleus. Nucleus outline visible showing no peripheral chromatin.
- 11. Iron Hematoxylin stain I.bütschlii trophozoite - cell shape is more irregular that Endolimax nana which is usually rounder.
- 12. Iron Hematoxylin stain I.bütschlii trophozoite - Binucleated cell
- 13. CYST Nuclear membrane all but invisible. Large glycogen vacuole seen on right side of cell.
- 14. CYST Large glycogen vacuole takes up most of the cell's interior
- 17. CYST BASKET OF FLOWERS, ESTER BASKET
- 18. The most common of the smaller intestinal amebae usually encountered with about the same frequency as in E. coli Size range for both trophozoites and cyst is similar to that of E. hartmanni [(usual size, 4-12 µm) and cyst forms (usual size, 5-10 µm)], thus makes confusion in unstained preparations Epidemiology is cosmopolitan Colonizes the colon
- 22. Trophozoites, unstained Not charateristic Trophozoites, stained Diagnostic: a nucleus with large karyosome, generally with little or no peripheral chromatin Suggestive: Ovoid Cysts, unstained Suggestive: Ovoid Cysts, stained Diagnostic: 4 nuclei with large karyosome and little or no peripheral chromatin
- 23. Trichrome stain The nuclei in this mature, quadrinucleated cyst have a large karyosome surrounded by a clear halo; peripheral chromatin is absent.
- 24. Wet mount examination of SAF- fixed specimen The nuclear characteristics of this trophozoite are clearly visible
- 25. VIDEO PRESENTATION THANK YOU FOR LISTENING!
Editor's Notes
- Trophozoites may be very difficult to recognize in an unstained concentrate as the nucleus is all but invisible. The cyst is more obvious because of its large vacuole which, as above, appears as a void within the cell. Iodine can be added to stain the glycogen, making it more visible with the production of a dark brown colour.