functions of the skin
secretes sebum, fatty substance that helps keep the hair & skin soft & supple helps form acid mantle.
Secretion
capillaries constrict (Vasocontriction) to help retain heat & dialate (Vasodilation) help cool the body down
Heat Regulation
the skin absorb small amounts of substances including products and UV radiation
Absorption
Acid mantle acts as a barrier to foreign substances & micro-organsim ( sebum is bactericidal) glands secrete sebum protects hair & skin becoming dry sensory provides protection by reacting to stimuli melanin in skin protects body from UV waterproof barrier
Protection
Glands excrete sweat to remove waste products from the body
Excretion
nerve endings react to touch, preasure, pain, heat&cold
nervous system/ sensations
sebum contains a fatty substance called 7-dehydro-cholestrol when UV rays touch our skin fatty substance converts to VD
Vitamin D protection
Langerhans cells in epidermis & Macrophages in the dermis phagocytise bacteria and foreign particles
Immunity
through capillary action in the dermis, (vasocontriction & Vasodilation) allows body to adjust to the amount of blood flow
blood Resivor