NR 302 - Exam 2 Concept Review.

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NR 302 - Exam 2 Concept Review. CH.12 Structures and functions of skin, hair, nails Skin: 3 layers 1. Epidermis (outer): thin but tough, cell are bound tightly together that form a rugged protecti... ve barrier. The inner basal layer forms new skin cells. 2. Dermis: is the inner supportive layer consisting of connective tissue, or collagen . This is tough , fibrosis area that enable skin to resist tearing. The sensory receptor, blood vessel, and lymphatics lie in the dermis. 3. Subcutaneous layer: composed of adipose tissue, which is made up of lobules of fat cells. This layer store fat for energy, provide insulation for temperature control , aid in protection by its soft cushion effect. Hair: are threads of keratin composed of 3 parts [Show More]

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