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Published byAlvin Smith Modified over 8 years ago
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Integumentary System
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Integumentary system: Consists of skin, hair, nails, and glands. Functions of the Integumentary System Protection Sensation Vitamin D production Temperature Regulation Excretion
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Regions of Skin Hypodermis or subcutaneous tissue: Skin sits on top, region that is attached to bone and muscle. Skin Dermis: Made up of dense connective tissue Epidermis: Consists of epithelial tissue that sits on top of the dermis
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Skin Structure
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Skin Cell Replacement Keratinization: Is the process where old cells protect new cells below that will eventually replace those old cells.
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Random Terms Stratum Corneum: Is the most superficial strata of epidermis that consists of dead cells. These flake off producing dandruff. Callus: Skin subject to friction will build up skin layers to prevent damage.
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Skin Color Skin color is determined by pigments in the skin, thickness, and by blood circulating through the skin. Melanin: Group of pigments responsible for skin, hair, and eye color. Large amounts of melanin are produced in freckles, moles, genitalia, and nipples Albinisms: Absence of melanin (White)
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Bloods Affect on Skin Increase Blood Flow = Increase in redness Blushing, anger, inflammatory response Decrease in Blood Flow = Decrease in oxygen pale or blue skin Cold, Shock, Cyanosis in babies
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Hair Hair: Common characteristics to all mammals, it covers most of the body surfaces. Parts to hair Shaft- Protrudes above the surface of the skin Hair Root and Hair Bulb- Are below the surface of the skin Hair Follicle- Living part of the hair
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Muscles Arrector Pili: Contraction of the arrector pili causes the skin or hair to “stand up”
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Glands Sebaceous Glands: Connected to ducts, and produce sebum an oily, white, lipid rich substance. Sweat Glands: Produce sweat to help cool the body down.
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Jaundice
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Nails Nail: Thin plate, consisting of dead stratum corneum cells.
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