Skin Structure + Function

• Hair Follicle - rakes and traps warm air when cold
• Air Erector Muscle - contracts to raise hair when cold outside, creates goosebumps
• Pore - releases sweat
• Sweat Duct - passage for sweat
• Sweat glands - produces sweat
• Blood Vessels [capillary] - vasoconstriction when cold and vasodilation when hot
• Sabaceous gland - produces oils for skin
• Fat cells - no function
• Adipose layer - insulates, but does not regulate heat
• Nerve sense sensors for: temperature, pressure, pain
• Epidermis - Hair Follicle, Air Erector Muscle
• Dermis - Pore, Sweat Duct, Sweat glands, Blood vessels
• Fat - fat cells, adipose layer
• Vasoconstriction - capillary contracts, pulls away from skins surface, heats hand to lose by conduction or radiation, conserves body heat
• Vasodilation - capillary dilates, pushed closer to surface, looks flushed, heat easily lost by conduction and radiation, release heat from body