40 terms

Ch. 7 Skin Structure, Growth and Nutrition

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Acne
Also Known as Acne vulgaris; skin disorder characterized by chronic inflammation of the sebaceous glands from retained secretions and propionibacterium acnes (P.acne) bacteria
Arrector pili muscles
Small Involuntary muscles in the base of the follicle that causes goose flesh, sometimes call goose bumps, and papillae.
Callus
Thickening of the skin caused by continued, repeated pressure on any part of the skin, especially the hands and feet.
Collagen
Fibrous protein that gives the skin form and strength.
Comedo (plural: comedones)
also known as blackhead: hair follicle filled with keratin ans sebum
dermal papillae (singular Papilla)
Small, cone-shaped elevations at the base of the hair follicles that fit into the hair bulb.
Dermatologist
Physician who specializes in diseases and disorders of the skin, hair, and nails.
Dermatology
Medical branch of science that deals with the study of skin and its nature, structure functions, diseases, and treatment.
Dermis
Inner Layer of the skin AKA derma, corium, cutis or true skin
Elastin
protein base similar to collagen that forms elastic tissue
Epidermal-dermal
The top of the papillary layer where it joins the epidermis
Epidermis
the outermost and thinnest layer of the skin; it is made up of five layers; stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum germinativum
Esthetician
A specialist in the cleansing, beautification, and preservation of the health of the skin on the entire body, including the face and neck
Eumelanin
a type of melanin that is dark brown to black in color. People with dark-colored skin mostly produce eumelanin. There are two types of melanin the other is pheomelain
Keratin
Fibrous protein of cells that is also the principal component of hair and nails.
Melanin
tiny grains of pigment, coloring matter that are produced by melanocytes and deposited into cells in the stratum germinativum layer of the epidermis and in the papillary layers of the dermis. There are two types of melanin; phoemelanin, which is red to yellow in color, and eumelanin, which is dark brown to black
Melanocytes
cells that produce the dark pigment called melanin
Motor nerve fibers
Fibers of the motor nerves that are distributed to the arrector pili muscles attached to hair follicles. Motor nerves carry impulses from the brain to the muscles.
papillary layer
Outer layer of the dermis, directly beneath the epidermis
papule
small elevation on the skin that contains no fluid but many develop pus (a pimple)
Pheomelanin
The other type of melanin the is red to yellow in color
Propionibacterium
aka p-acne technical term for acne bacteria
Pustule
raised imflamed papule with a white or yellow center containing pus in the top of the leiason referred to as the head of the pimple
reticular layer
Deeper layer of the dermis that supplies the skin with oxygen and nutrients; contains fat cells, blood vessels, sudoriferous (sweat glands), hair follicles. Sebum is the fatty or oily secretion of the sebaceous glands
sebaceous glands
also known as oil glands; glands connected to hair follicles. Sebum is the fatty or oily secretion of the sebaceous glands
Sebum
A fatty or oily secretion that lubricates the skin and preserves the softness of the hair
Secretory coil
coiled base of the sudoriferous (sweat gland)
Secretory nerve fibers
Fibers of the secretory nerve that are distributed to the sudoriferous glands & sebaceous glands. Secretory nerves, which are part of the autonomic nervous system (ANS), regulate the excretion of perspiration from the sweat glands and control the flow of sebum to the surface of the skin
Sensory nerve fiber
Fibers of the sensory nerves that react to heat, cold, touch, pressure, and pain. Sensory receptors that send messages to the brain
Stratum corneum
the outer layer of the epidermis aka the horny layer of the epidermis
Stratum germinativum
the deepest live layer of the epidermis that produces new epidermal skin cells and is responsible for growth. aka basal cell layer
Stratum granulosum
the layer of the epidermis composed of cells that look like granules and are filled with keratin; replaces cells shed from the stratum corneum
Stratum lucidum
Clear, transparent layer of the epidermis under the stratum corneum
Stratum spinosum
The spiny layer just above the stratum germinativum layer.
Subcutaneous tissue
Fatty tissue found below the dermis that gives smoothness and contour to the body, contains fat for use as energy, and also acts as a protective cushion for the outer skin
Tactile Corpuscles
Small epidermal structures with nerve endings that are sensitive to touch and pressure
Vitamin A
Supports the overall health of the skin; aids in the health, function, and repair of skin cells; has been shown to improve the skin's elasticity and thickness.
Vitamin C
An important substance nedded for proper repair of the skin and tissues; promotes the production of collagen in the skin's dermal tissues; aids in and promoters the skin's healing process
Vitamin D
Enables the body to properly absorb and use calcium, the element needed for proper bone development and maintenance.
Vitamin E
Helps protect the skin from the harmful effects of the sun's UV light