The Integumentary Syste1

The Integumentary Syste1 - o Apocrine sweat glands produce...

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The Integumentary System Accessory Skin Structures Hair o Hairs are columns of dead, keratinized epithelial cells. Each hair consists of a shaft (above the skin), root (below the skin), and hair bulb (site of hair cell formation). o Hairs have a growth phase and a resting phase. Muscles o Contraction of the arrector pili, which are smooth muscles, causes hair to "stand on end" and produces "goose flesh." Glands o Sebaceous glands produce sebum, which oils the hair and the surface of the skin. o Merocrine sweat glands produce sweat, which cools the body.
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Unformatted text preview: o Apocrine sweat glands produce an organic secretion that can be broken down by bacteria to cause body odor. Nails o The nail consists of the nail body and nail root. o The nail matrix produces the nail, which is stratum corneum containing hard keratin. Physiology of the Integumentary System Protection o The skin prevents the entry of microorganisms, acts as a permeability barrier, and provides protection against abrasion and ultraviolet light. Sensation o The skin contains sensory receptors for pain, heat, cold, and pressure....
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