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CHP6 The Intugumentary System

Cuboidal epith in duct dermis portion keratinocytes

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Unformatted text preview: • • cuticle (eponychium) nail matrix & nail root above it nail nail plate (visible nail) nail bed (skin nail rests on) nail groove (space beneath) lunule (white crescent) nail fold (skin around nail) Glands Glands 5 Cutaneous glands= merocrine sweat, apocrine sweat, merocrine sebaceous, ceruminous, & mammary glands Merocrine sweat glands= most numerous, watery sweat to cool Merocrine most body; ~3-4 mil glands in adult skin body; • Abundant in palms/soles/foreheads & widely Abundant distributed on body distributed • Simple tubular glands w/ twisted coil in Simple dermis or hypodermis & duct leading to surface dermis • Duct lined w/ stratified cuboidal epith in Duct dermis portion & keratinocytes in epidermis dermis • Myoepithial cells= smooth muscle-like cells that contract to smooth move sweat to surface (stimulated by SNS) move • Sweat= 99% H2O; pH 4-6; contains K+, urea, lactic acid, urea, NH3, NaCl NH Glands (cont.) Glands 5 gland types (cont.)Apocrine s.g.= groin, anal region, axilla, areola, beard .= (males) (males) • Ducts lead to hair follicles (not skin surface); secretions Ducts produced same as merocrine (exocytosis) but have larger lumen…so different name lumen…so • Thicker sweat due to more fatty acids • Scent glands that respond to stress, sexual stimulation; Scent develop @ puberty (same glands in other animal spp.) develop • Doesn’t have a bad odor & can be ‘attractive’ to some ppl • May produc...
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