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AP CLC 244

Week 2 Thursday Dermis

Three layers of the skin Epidermis, Dermis, Hypodermis
Dermis facts The leather of the skin, Neurons, Vasculature (bloody), lymph. Two layers: Papillary, Reticular
Papillary (layer) Interracial Fluid (I.F.), Collagen, elastin, vasculature (bloody). THE WAVY PART.
Why do we have finger prints In the Papillary layer the papilla (nipple) is larger. Bumbs are dermal papillae. Collectively called friction ridges.
Why do fingers and toes wrinkle in water Having to do with the nervous system. Helps you grab something better with the ridges.
Blister /blood blister The papillary layer sends Interstical Fluid to protect the deeper layers. Blood blister means the papillary layer was hurt. The epidermis is not vascular.
Reticular layer, deeper, 80% Collogene, not very vascular, filled with water, irregular connective tissue
Striae Tears in the reticular layer, tear under your skin
Appendages of the skin Sudoniferous glands , Sebaceous glands
Sudoniferous gladns (sweat gland) Eccrine and Apocrine glands. Eccrine: water, salt, acid waste. On palm, soul, forehead. Apocine: sweat with protein and lipids. On arm pit, analgenital
sebaceious glands oil glands only on hair. Secrete sebum. Bactericide (kills bacteria). Acne: sebum that blocks the duct. Open comedo - black head. Closed comedo - white head.
Created by: kanderson96