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dermatology

the medical branch of science that deals with the study of skin its nature, structure, functions, diseases, and treatment.

dermatologist

is a physician engaged in the science of terating the skin, its structures, functions, and disease.

esthetician

is a specialist in the cleansing, preservation of health, and beautification of the skin and body.

epidermis

is the outermost layer of the skin.

basal cell layer

also referred to as the stratum germinativum the deepest layer of the epidermis.

melanocytes

melanin-forming cells.

stratum spinosum

spiny layer of the epidermis.

stratum granulosum

granular layer of the epidermis.

stratum lucidum

clear, transparent layr just under the skin surface.

stratum corneum

outer layer of the epidermis.

keratin

fiber protein that is the principal component of hair and nails.

dermis

underlying or inner layer of the skin; also called the derma, corium, cutis, or true skin.

papillary layer

outer layer of the dermis, directly beneath the epidermis.

tactile corpuscles

small epidermal structures with nerve endings that are sensituve to touch and pressure.

epidermal-dermal junction

the top of the papillary layer where it joins the epidermis.

subcutaneous tissue

fatty layer 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 fo the outer skin; also called adipose or subcutis tussue.

adipose

tissue that gives smoothness and contour to the body, contains fats for the use as energy, and also acts as a protective cushion for the outer skin.

blood

nutritive fluid circulatin thhrough the curculatory system to supply oxygen and nutrients to cells and tissues, and to remove carbon dioxide and waste from them.

motor nerve fibers

distributed to the arrector pili muscles attached to the hair follicles.

sensory nerve fibers

react to heat, cold, touch, pressure, and pain. these sensory receptors send messages to the brain.

secretory nerve fibers

distributed to the sweat and oil glands of the skin.

melanin

tiny grains of pigment deposited in the basal cell layer of the epidermis and papillary layers of the dermis.

collagen

fibrous protein that gives the skin form and strength.

elastin

protein base similar to collagen that forms elastic tissue.

sudoriferous glands

sweat glands of the skin.

sebaceous glands

oil glands of the skin connecte to hair follicles.

secretory coil

coiled base of sweat glands.

comedone

pore impaction that could lead to an acne papule or pustule.

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