Chapter 5: The Integumentary System
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Skin and its derivatives (sweat and oil glands, hairs, and nails) make up a complex set of organs that serves several functions, mostly protective
Epidermis (epi = upon)
composed of epithelial cells - most outermost protective shield of the body - structurally, a keratinized squamous epithelium consist of four distinct cell ttypes and four or five distinct layers
Keratinocytes (kera = horn)
chief role is to produce keratin (fibrous protein that helps give the epidermis its protective properties
tough, leathery layer composed mostly of fibrous connective - making up the bulk of the skin
Hypodermis (superficial fascia)
subcutaneous tissue just deep to the skin - besides storing fat, anchors the skin to the underlying structures, but loosely enough that skin can slide relatively freely over those structures
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