Cell Structures Revision PDF

Revision I.L.Os: -Revision of : all electron micrographs of cell and its contents of organelles , inclusions and nucleus and nucleolus Electron micrographs of cell during different mitotic devising phases Cell membrane Cell membrane é Cell membrane Xr EM cell membrane EM cell membr...

Revision I.L.Os: -Revision of : all electron micrographs of cell and its contents of organelles , inclusions and nucleus and nucleolus Electron micrographs of cell during different mitotic devising phases Cell membrane Cell membrane é Cell membrane Xr EM cell membrane EM cell membrane EM of cell membrane Cell membrane & cell coat Modification of cell membrane 5611 Microvilli Microvilli Microvilli & cell coat Junctional complex Cell junctions Cell Junctions Hemidesmosomes Mitochondria Mitochondria Mitochondria Mitochondria Mitochondria Dividing mitochondria Dividing mitochondria Golgi apparatus Golgi apparatus Endoplasmic reticulum RER RER Mitochondria + RER Smooth endoplasmic reticulum SER Smooth endoplasmic reticulum SER Lysosomes 2ry lysosomes & mitochondria 1ry lysosomes & multivesicular bodies 2ry lysosomes (autophagic vacuole) Ribosomes Free ribosomes and attached ribosomes Free ribosomes and poly somes Cytoskeleton MICROTUBULES (ls & ts) ▪ Microtubules LS & TS Actin Filaments Centriole & cilia  Centriole (ls & TS) Ñ CENTRIOLE(LS,TS) Centriole (TS)  Shafts Basal bodies Cilia (T S shafts) Cilia (ls &TS))  Cell inclusions:- ✓Stored food: Glycogen and lipids ✓Pigments : Endogenous and exogenous Glycogen granules (alpha) + SER + Mitochondria (Beta ) Lipid droplets  Lipid droplets L L LIPID DROPlets  Lipid droplets L L Nucleus & nucleolus  Nucleus and nucleolus Types of chromatin: PC 1- Euchromatin 2- Heterochromatin which consists of : A- peripherals chromatin IC B- nucleolus associated NAC chromatin C- island of chromatin  pc Nucleus and nucleolu s IS RER nucleolus  Cell division Mitosis: It is a cell division that occurs in somatic cells. The result is two daughter cells with the same number of chromosomes as the mother cell (46 chromosomes). prophase Mitotic metaphase Mitotic metaphase Mitosis metaphase Anaphase a Telophase Cleavage furrow TELOPHASE Epithelium Simple Squamous Epithelium (Bowman’s capsule of kidney) Bowmans capsule Simple Squamous Epithelium Simple Cubical Epithelium ( thyroid) Simple columnar epithlieum (stomach ) Pseudo-stratified Columnar Ciliated with Goblet Cells (trachea) Stratified Squamous Non Keratinized Epithelium (esophagus) Stratified squamous keratinized epithelium (Epidermis of skin) Keratin Stratified squamous keratinized epithelium (Epidermis of skin)  Transitional Epithelium (Urinary bladder)  Transitional Epithelium (Urinary bladder) Special types of epithelium According to type of secretion Neuroepithelium Connective tissue Mucoid connective tissue (Umblical cord) Hx&E  Dense regular connective tissue Hx&E h White Adipose connective tissue Hx&e