CHP6 The Intugumentary System

Disorders skin mammary glands milk producing glands

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Unformatted text preview: e pheromones that affect physiology/behvr of other May members of spp members • Man’s beard grows faster when female live w/ them Glands (cont.) Glands 5 gland types (cont.)Sebaceous glands= oily secretions (sebum) • Flask-shaped, short ducts that open into hair follicles; some Flask-shaped, open directly to skin surface open • Holocrine glands, so broken cells are replaced by mitosis @ Holocrine base of gland base • Sebum keeps scalp from becoming dry/cracked Ceruminous glands= external ear canal ONLY • Earwax (cerumen) forms from sebum secretions + dead Earwax epidermal cells epidermal • Simple, coiled tubular glands w/ ducts to the skin surface • Keeps eardrum pliable, H2O-proofs canal, bactericidal affects Skin disorders Skin Mammary glands= milk-producing glands in women that milk-producing develop during pregnancy/lactation develop • Modified apocrine glands making a thicker, milky secretion • Mammals have 2 rows of m.g., but primates have reduced to 2 Skin disorders= table 6.3, burns, & skin cancer 3 types of skin cancer• Basal cell carcinoma= most common, least serious since rarely most metastasizes; begins in stratum basale w/ cells later metastasizes; invading dermis • Surface lesion forms as a bump w/ a central depression • Squamous cell carcinoma= arises from keratinocytes of stratum arises spinosum; good recovery w/ early detection & removal...
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