3 Flashcards
subcutaneous tissue
also known as adipose or subcutis tissue; fatty tissue found below the dermis that gives smoothness and contour to the body, contains fats for energy, and acts as a protective cushion for the skin
broad-spectrum sunscreen
sunscreen product that has been shown to protect from burning, skin cancer, and premature aging; protects against both UVA and UVB radiation from the sun
regulate the excretion of perspiration from the sweat glands and control the flow of sebum to the surface of the skin
regulate the excretion of perspiration from the sweat glands and control the flow of sebum to the surface of the skin
arrector pili muscles
small, involuntary muscles in the base of the hair follicle that cause goosebumps
hair papillae
cone-shaped elevations at the base of the follicle that fit into the hair bulb; papillae are filled with tissue that contains the blood vessels and cells necessary for hair growth and follicle nourishment
sebaceous glands
also known as oil glands; glands connected to hair follicles; secrete sebum
pheomelanin
type of melanin that is red to yellow in color
collagen
fibrous, connective tissue made from protein; that gives the skin form and strength
barrier function
complex of lipids that keep the skin moist by preventing water evaporation and guards against irritants penetrating the skin surface; and to help regulate the skin’s pH
melanin
tiny grains of pigment (coloring matter) produced by melanocytes deposited into cells in the stratum germinativum layer of the epidermis and papillary layers of the dermis
motor nerve fibers
fibers of the motor nerves that are distributed to the arrector pili muscles attached to hair follicles; carry impulses from the brain to the muscles
sensory nerve fibers
fibers of the sensory nerves that react to heat, cold, touch, pressure, and pain
sweat glands
also known as sudoriferous glands; excrete perspiration and detoxify the body by excreting excess salt and unwanted chemicals
dermatology
medical branch of science that deals with the study of skin and its nature, structure, functions, diseases, and treatment
sebum
fatty or oily secretion that lubricates the skin and preserves the softness of the hair
stratum corneum
also known as horny layer; outermost layer of the epidermis
papillary layer
outer layer of the dermis, directly beneath the epidermis
stratum granulosum
also known as granular layer; layer of the epidermis composed of cells filled with keratin that resemble granules
stratum spinosum
also known as the spiny layer; layer of the epidermis just above the stratum germinativum (basal) layer
stratum lucidum
clear, transparent layer of the epidermis under the stratum corneum
dermal-epidermal junction
top of the papillary layer where it joins the epidermis
elastin
protein base similar to collagen that forms elastic tissue
epidermis
outermost and thinnest layer of skin, made up of five layers: stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum germinativum
melanocytes
cells that produce the dark skin pigment called melanin
dermis
also known as derma, corium, cutis, or true skin; underlying or inner layer of the skin
subcutaneous layer
also known as hypodermis or superficial fascia; consists of subcutaneous (fat) tissue located beneath the dermis
eumelanin
type of melanin that is dark brown to black in color
secretory coil
coiled base of the sudoriferous (sweat) gland
dermatologist
physician who specializes in diseases and disorders of the skin, hair, and nails
stratum germinativum
commonly called the basal cell layer; deepest, live layer of the epidermis that produces skin cells and is responsible for growth
tactile corpuscles
small epidermal structures with nerve endings that are sensitive to touch and pressure
sudoriferous glands
also known as sweat glands; excrete perspiration and detoxify the body by excreting excess salt and unwanted chemicals
dermal papillae
membranes of ridges and grooves that attach to the epidermis
reticular layer
deeper layer of the dermis that supplies the skin with oxygen and nutrients
keratin
fibrous protein of cells that is also the principal component of skin, hair and nails
