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A&P Ch. 21 Integumentary System with
Updated & 2026/2027
weight of skin - âœâ€Ã¢Å“â€6 lbs
skin - âœâ€Ã¢Å“â€largest organ of the human body
5 main functions of the integumentary system - âœâ€Ã¢Å“â€protection, regulation, sensation, absorption, and
secretion
vitamin D - âœâ€Ã¢Å“â€produced in skin
Regulation (skin) - âœâ€Ã¢Å“â€temperature
rises in body temperature - blood vessel dilate.
Sensation (skin) - âœâ€Ã¢Å“â€contains microscopic nerve endings.
sensory reaction types - âœâ€Ã¢Å“â€pressure, traction, heat, cold, pain, etc.
Absorption (skin) - âœâ€Ã¢Å“â€Oil, water and vitamins provide necessary moisture , nourishment and protection
Secretion (skin) - âœâ€Ã¢Å“â€perspiration
build up causes bacterial growth - creating body odor
Layers of skin - âœâ€Ã¢Å“â€epidermis, dermis, subcutaneous
Epidermis - âœâ€Ã¢Å“â€outermost layer of skin
A&P Ch. 21 Integumentary System with Updated & 2026/2027
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