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INTEGUMENTARY SYSTEM CH 4

Explore the integumentary system, including skin layers and functions. Learn about epithelial membranes and connective tissues. Discover the role of melanin, carotene, and oxygen in skin color. Understand the importance of serous membranes and dermis in maintaining overall health.

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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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