ANAT 261 Chapter Notes - Chapter 18: Loose Connective Tissue, Lamina Propria, Basal Lamina

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Types of tissues: body made of 4 types of tissue. Epithelial: aggregated, small amount, lining of surface & body polyhedral cells cavities, glandular secretion. Connective: various fixed & wandering cells, abundant, support & protection of tissues / organs. Muscular: elongated, moderate, contraction (movement) contractile cells. Nervous: elongated with fine, very small, nerve impulse transmission processes. Epithelial cells: epithelial line the cavities of organs and cover body surface, line interior & exterior surfaces of body, mainly function in covering, absorption and secretion. Features: size & morphology (linked to function, columnar / cuboidal / squamous, generally do not contain blood vessels, rest on connective tissue (lamina propria, polarity: uneven distribution of membrane proteins. Skin layers: subcutaneous layer / hypodermis not considered part of integument. Dermis: supports epidermis, basement membrane always found between the two, bm made of basal lamina & reticular lamina, thickness varies with body region.

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