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13 cards from this deck
Physical barrier preventing pathogen entry
Skin, hair, nails, and glands
Three: cornified, granular, Malpighian
Dead cells; impermeable barrier
Keratin - strengthens skin
Produces melanin; protects against UV rays
Collagen and elastin (strength & elasticity)
Exocrine
Secrete sweat to cool body
Sebum - prevents skin drying
Contract; hair stands up, traps warm air
Regulate temperature by increasing blood flow to skin
Stores fat for insulation and energy
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