Anatomy and Cell Biology 3309 Lecture Notes - Lecture 12: Stratified Squamous Epithelium, Simple Columnar Epithelium, Connective Tissue
24 Nov 2017
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Epithelia, glands and cell junctions: epithelia and glands. Organized accumulation of cells and their products that function in a collective manner. 4 basic tissues: epithelial: lines outside the body and inside of hollow organs/ cavities, connective: provides structural and functional support for other tissues, protection. Location: covers surfaces and lines walls of hollow organs and body cavities (wherever body has contact with the outside world) Cells are characterized by being: closely apposed, adhered by junctions, polarized. 2: apical (free domain, exposed to the open spaces) Simple squamous: function: passive transport of fluids or gases, examples, mesothelium: lines body cavities and outside of some organs, endothelium: lines blood vessels [very thin cytoplasm above the smooth. Simple cuboidal: as tall as wide, single layer, function: lines tubes and ducts. Dark spot/basophilic structure= lymphoid immune cells which reside in epithelia, on guard for infection.
