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Skin Theory


Epidermis Outermost layer of the skin, also referred to as cuticle or scarf skin
Stratum Basale Lowest or deepest level of the epidermis where mitosis or cell division takes place
Stratum Spinosum Layer of the epidermis just above the stratum germinativum. Sometimes considered part of the stratum germinativum, include cells that have absorbed melanin to distribute pigmentation to other cells
Stratum Granulosum, Layer of the epidermis below the stratum lucidum and above the stratum spinosum; in this layer the cells become more regularly shaped and look like many tiny granules
Stratum Lucidum Layer of the epidermis just below the stratum corneum, it is located on the palms of the hands and the soles of the feet where there are no hair follicles
Stratum Corneum Uppermost layer of the epidermis; the toughest layer composed of keratin protein cells that are continually shed and continually replaced by new cells from below
Dermal Underlying or inner layer of the skin also called dermis, derma, corium, cutis or true skin; made up of connective tissues; sudoriferous glands, sebaceous glands, and a major portion of each hair follicle
Subcutaneous Adipose ( fatty)tissue below the dermis layer of the skin; protective cushion for the skin acts as a shock absorber to protect the bones and help support the delicate structures such as blood vessels and nerve endings
Sebaceous Glands oil glands partially controlled by the nervous system; sac like glands that are attached to hair follicles result in oily skin when an over abundance of sebum is produced by the gland
Sudoriferous Glands Controlled by the nervous system of the body, each gland consists of a coiled base and tube like duct opening on the surface of the skin to form sweat poor
Sun Protection Factor (SPF) Rating system for Sunscreen to determine how long one can stay out in the Sun without burning
Dermatology Study of the skin, its structure, functions, diseases, and treatment
Esthetics Known as the process of cleansing, toning, moisturizing, protecting and enhancing the skin
Skin The largest organ of the body that covers nearly 20 ft² of the body surface and protects it from invasion from outside particles
Integumentary System Consists of the skin and its layers
Sensation Feeling or perception generated by the nerve ending just under the outer layer of the skin that makes you aware of heat,cold, touch, pain, and pressure
Reflex the reaction to a sensation
Heat Regulation Skin's ability to help maintain the body's temperature
Absorption Skin's ability to permit substances like water and oxygen to pass through its tissues
Protection The skin's ability to shield the body from the direct impact of heat, cold, bacteria, and other aspects of the environment that could be detrimental to one's health
Excretion The skin's ability to eliminate sweat, salt, and wastes from the body therefore helping to remove toxins from the internal systems
Dry Skin Characterized by signs such as peeling and flaking; chaps easily and has a general all over taut feeling; has fewer blemishes and is not prone to acne
Oily Skin Condition that has an all over shiny look and/or rough texture with blackheads and enlarged pores
Normal Skin Characterized by a fresh and healthy color ,a firm moist and smooth texture, freedom from blackheads and blemishes and does not appear oily
Combination Skin Recognized by the shiny T zone( forehead, nose,and chin) ,the presence of a noticeable dryness in the cheek and jawline and hairline areas; blackheads and enlarged pores are often evident on the nose and chin
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