BIO 210 Lecture Unit 2 Exam Graded A+

BIO 210 Lecture Unit 2 Exam Graded A+ what tissue types make up the integument? connective, epithelial, muscle (arrector pili), nervous (merkle cells) another term for integument cutaneous membrane study of skin: dermatology subcutaneous layer aka hypodermis, connective and adipose tissue layer just under the dermis thin skin covers most of the body thick skin Covers the palms of the hands and soles of the feet Has five layers of keratinocytes melanin A pigment that gives the skin its color and protects from UV exposure nevus mole freckles flat, melanized patches capillary hemangioma a soft, raised, pink, or red vascular birthmark cavernous hemangioma collection of blood, the most common benign tumor lines of cleavage collagen organized in parallel lines in body, cuts in surgery are usually made parallel to these lines to help healing striae Stretch marks; Linear dermal scars that affects skin that is subjected to continuous stretching; vasoconstriction narrowing of blood vessels vasodilation widening of blood vessels integumentary structures derived from epidermis nails, hair, exocrine glands of the skin Where is hair not found? palms, soles, lips terminal hair coarse, long hair of eyebrows, scalp, axillary, and pubic regions vellus hair pale, fine body hair of children and adult females Lanugo hair also known as Vellus Hair, is the soft, white and downy hair found on the body; usually lacking a medulla merocrine sweat glands coiled tubular glands that discharge their secretions directly onto the surface of the skin telogen phase the final growth