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INTEGUMENTARY SYSTEM CH 4

INTEGUMENTARY SYSTEM CH 4. 2 Groups of Body Membranes A. Epithelial Membranes (3 types) p97 1. Cutaneous-skin 2. Mucous memb-line organs open to outside 3. Serous Membrane-line body cavities and occur in pairs (see below)

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INTEGUMENTARY SYSTEM CH 4

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  1. INTEGUMENTARY SYSTEM CH 4

  2. 2 Groups of Body Membranes • A. Epithelial Membranes (3 types) p97 • 1. Cutaneous-skin • 2. Mucous memb-line organs open to outside • 3. Serous Membrane-line body cavities and occur in pairs (see below) • Parietal vs visceral= these are seperated by serous fluid to prevent… 3Types of serous membrane • 1.Peritonium= _________2. Pluera=________ 3. Pericardium=___________

  3. B. Connective Tissue-soft tissue that lines joints. Called synovial membranes!

  4. II. Integumentary System (skin,hair,nails,etc) Functions..see p 99 Table 4.1 Skin has 3 layers 1. Epidermis (outer) can keratinize w/ stratifies squamous epith 2. Dermis (inner) w/ dense conn. Tiss 3. Hypodermis (deepest) w/ subcutaneous tiss or fat. Helps anchor skin Blisters?

  5. Layers of Epidermis has 5 zones called strata p100 It is avascular (so shaving) and has keratin cells *Layer 5 (deepest) stratumbasale-closest to dermis and receives nutrients, new cells made here *Layer 4 stratum spinosum *Layer 3 stratum granulosum *Layer 2 stratum lucidum – layered like hands *Layer 1 stratum corneum- 20-30 cells thick, rubs and flakes off. New epidermis every … Dermis (under) connective tissue

  6. 2. Dermis-strong/stretchy ex. Hide. Thicker in some areas Capillaries regulate skin temp here. Composed of collagen and ellastic fiber. Aging… Fingerprints,overheating…

  7. Skin Color: Amt and kind of melanin, amt of carotene, amt of O2 Melanin-skin pigment produced by melanocytes, Jaudice=bile not absorbed Bruises=blood clots

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