Nursing 1180A/B Lecture Notes - Lecture 4: Stratum Basale, Stratum Granulosum, Stratum Spinosum
24 Nov 2017
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Document Summary
Skin: protects from outside environment and disease, comprised of 3 layers: Important in thermoregulation and synthesis of vitamin d: epidermis: Outermost layers so the 1st line of defense & the vitamin d absorber. No blood vessels so relies on dermis for nutrients and expulsion of waste. Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum germinativum: dermis: Has blood vessels, nerves, sebaceous glands, lymphatic vessels, hair follicles, and sweat glands that support the epidermis. Variations in skin thickness are from difference in dermis thickness: subcutaneous layer: Provides insulation, storage of caloric reserves, and cushioning against external forces. Maintain body temp by controlling the evaporation and reabsorption of water: eccrine gland: Cover most of body that open directly onto skin surface & secrete sweat: apocrine gland: In axillae and genital areas and secrete a thicker, milky sweat into the hair follicle and once mixes with bacterial flora is produces a musky odor: sebaceous gland:
