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Skin Structure
| Term | Definition |
|---|---|
| arrector pili muscles | small, involuntary muscles in the base of the hair follicle that causes goosebumps |
| barrier function | complex of lipids that keep the skin moist; to help regulate the skin's pH |
| broad-spectrum sunscreen | product that has been shown to protect from burning skin cancer, and premature aging. |
| collagen | fibrous, connective tissue made from protein; gives skin form and strength |
| dermal papillae | membranes of ridges and grooves that attach to the epidermis |
| dermatologist | physician who specializes in disease and disorders |
| dermatology | medical branch of science that deals with the study of skin |
| dermis | underlying or inner layer of the skin ; also known as derma, corium, cutis, or true skin |
| elastin | protein base similar to collagen that forms elastic tissue |
| dermal-epidermal junction | top of the papillary layer where it joins the epidermis |
| epidermis | outermost and thinnest layer of skin made up of five layers |
| eumelanin | type of melanin that is dark brown to black in color |
| hair papillae | cone-shaped elevations at the base of the follicle that fit into the hair bulb |
| keratin | fibrous protein of cells that is also the principal component of skin, hair and nails |
| melanin | tiny grains of pigment produced by melanocytes |
| melanocytes | cells that produce the dark skin pigment called melanin |
| motor nerve fibers | carry impulses from the brain to the muscles |
| papillary | outer layer of the dermis, directly beneath the epidermis |
| pheomelanin | type of melanin that is red to yellow in color |
| reticular layer | deeper layer of the dermis that supplies the skin with oxygen and nutrients |
| sebaceous glands | oil glands, secrete sebum |
| sebum | fatty or oily secretion that lubricates the skin and preserves the softness of the hair |
| secretory coil | coiled base of the sudoriferous (sweat) glands |
| secretory nerve fibers | regulate the excretion of perspiration from the sweat glands and controls the flow of sebum to the surface of the skin |
| sensory nerve fibers | fibers of the sensory nerves that react to heat, cold, touch, pressure, and pain |
| stratum corneum | horny layer; outer most layer of the epidermis |
| stratum germinativum | basal cell layer; deepest, live layer of the epidermis |
| stratum granulosum | granular layer; composed of cells filled with keratin that resemble granules |
| stratum lucidum | clear, transparent layer of the epidermis under the stratum corneum |
| stratum spinosum | spiny layer, just above the basel layer |
| subcutaneous layer | consists of subcutaneous (fat) tissue located beneath the dermis |
| subcutaneous tissue | fatty tissue found below the dermis that gives smoothness and contour to the body |
| sudoriferous glands | sweat glands; excrete perspiration and detoxify the body by excreting excess salt and unwanted chemicals |
| sweat glands | excrete perspiration and detoxify the body by excreting excess salt and unwanted chemicals |
| tactile corpuscles | small epidermal structures with nerve endings that are sensitive to touch and pressure |
Created by:
lilia_annette
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