Term
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Definition
| melanin, carotene and hemoglobin are the three main factors in this |
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Term
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Definition
| causes the skin's color to vary from pale yellow to tan to black |
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Term
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Definition
| most plentiful in the epidermis of the penis, nipples, areola, face and limbs |
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Term
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Definition
| everyone has the same number of these but the amount of pigment they produce and transfer to keratinocytes determines differences in skin color |
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Term
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Definition
| freckles and age spots can form when this accumulates in patches |
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Term
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Definition
| inherited inability of an individual to produce melanin |
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Term
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Definition
| yellow-orange pigment that gives egg yolk and carrots their color |
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Term
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Definition
| has carotene as its precursor and is used to synthesize pigments needed for vision |
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Term
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Definition
| found in the stratum corneum and fatty areas of the dermis and subcutaneous layer |
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Term
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Definition
| oxygen-carrying pigment inside rbc's |
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Term
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Definition
| located on most areas of the skin with the exception of the palms, palmer surfaces of the fingers, soles and plantar surfaces of the toes |
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Term
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Definition
| each one is made up of a thread of dead keratinized cells with two parts, the shaft and root; AKA pili |
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Term
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Definition
| superficial portion of the hair seen projecting out from the skin |
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Term
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Definition
| below the surface of the skin and penetrates into dermis and even subcutaneous layer |
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Term
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Definition
| surrounds the root and surrounded by a nerve ending called a hair root plexus |
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Term
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Definition
| composed of 2 layers of epidermal cells- external and internal root sheaths surrounded by a connective tissue sheath |
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Term
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Definition
| the base of each hair follicle |
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Term
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Definition
| smooth muscle that extends from the upper dermis to the side of each hair follicle |
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Term
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Definition
| comes from melanin, variants result in different color hair; grey hair is the result of a decline in melanin, white hair is from an accumulation of air bubbles in the shaft |
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Term
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Definition
| single or group of epithelial cells that secrete specialized substances |
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Term
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Definition
| oil glands in the dermis that open into hair follicles or directly onto skin surface; increased activity in adolescence |
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Term
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Definition
| oily substance secreted from sebaceous gland; pimples can form if it is nutritive to certain bacteria |
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Term
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Definition
| keeps hair from drying out, prevents excess evaporation of water from skin, and inhibits bacterial growth |
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Term
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Definition
| enlarged these with an accumulation of sebum can cause blackheads (color is from melanin and oxidized oil) |
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Term
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Definition
| sweat glands of 2 different groups- eccrine and apocrine |
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Term
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Definition
| most common type, located throughout skin |
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Term
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Definition
| found in axilla, groin, areolae of breasts and bearded regions of face |
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Term
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Definition
| do not begin to function until puberty |
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Term
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Definition
| located in external auditory meatus (ear canal); secretes cerumen (ear wax) |
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Term
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Definition
| plates of tightly packed, hard, keratinized cells of the epidermis |
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Term
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Definition
| average growth is about 1 mm per week |
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Term
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Definition
| portion of the nail that is visible |
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Term
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Definition
| part that extends past end of finger or toe |
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Term
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Definition
| portion that is not visible |
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Term
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Definition
| whitish semilunar area near the nail root |
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Term
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Definition
| nail growth is caused by the transformation of the superficial cells of this into nail cells |
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Term
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Definition
| made up of stratum corneum |
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