Lecture 18, Ch. 40 - Lecture#18 Date Chapter 40 ~ An...

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Lecture #18 Date _______ Chapter 40 ~ An Introduction to Animal Structure and Function
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Tissues : groups of cells with a common structure and function (4 types) Anatomy : structure Physiology : function 1- Epithelial: outside of body and lines organs and cavities; held together by tight junctions basement membrane : dense mat of extracellular matrix Simple: single layer of cells Stratified: multiple tiers of cells Cuboidal (like dice) Columnar (like bricks on end) Squamous (like floor tiles) mucous membrane
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Tissues, II 2- Connective: bind and support other tissues; scattered cells through matrix; 3 kinds: A-Collagenous fibers (collagen protein) B-Elastic fibers (elastin protein) C-Reticular fibers (thin branched collagen fibers) Loose connective tissue: binds epithelia to underlying tissue; holds organs 1-Fibroblasts- secretes extracellular proteins 2-Macrophages- amoeboid WBC’s; phagocytosis 3- Adipose tissue- fat storage; insulation Fibrous connective tissue:
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