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34 Cards in this Set
- Front
- Back
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What are the the funtions of sweat glands?
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prevent overheating, secrete cerumen, and secrete milk
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Eccrine (merocrine) Gland
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found in palms, soles of feet and forehead
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Apocrine sweat glands
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found in axillary and anogenital area
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Ceruminous glands
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modified apocrine clands in external ear that secrete cerumen
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Mammary glands
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Specialized sweat glands that secrete milk
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Sebaceous glands
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simple alveolar glands found all over body. soften skin when stimulated by hormones, secrete oily called sebum
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Hair
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Filamentous, dead keratinized cell produce by follicles
Contain hard keratin, pigmented by melanocytes |
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Make up of hair
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Shaft projecting from skin, root embedded in skin.
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Hair consists of
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A medulla (core)
Cortex and outermost cuticle |
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Functions of hair
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maintain warmth,
alert body of insect presence Guard scalp from trauma, heat loss and sun |
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What surfaces DO NOT have hair?
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Palms, soles, lips, nipples, portions of external genetalia
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Structure of follicle
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Tube within skin, Dermal rootsheath Epithelial root sheath, vascular tissue (dermal papilla) for nutrient
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External layer of follicle resembles
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skin epidermis
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Internal layer of follicle
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Cells overlap to make connection with cells of cuticle
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Hair growth
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3 cycles
anagen Catagen Telogen |
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Types of hair
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Vellus and terminal
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Vellus hair
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pale fine body hair found in children and adult female
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Terminal
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Coarse, long hair of eyebrows, scalp, axillary, and pubic regions
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Alopecia
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Thinning or baldness
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Pattern Baldness
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Genetic and hormonal
Sex influenced trait expressed with high level of testosterone |
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Hirsutism
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Excessive hair growht D/T hormone imbalance (ovary or adrenal cortex
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Eumalanin
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Colors brown and black hair
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Pheomelanin
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Blond hair pigment, little eumelanin
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Red hair
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Contains little eumelanin but lots of pheomelanin
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White hair
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air in medulla and lack of pigment in cortex
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First degree burn
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only epidermis is damaged
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Second degree burn
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epidermis and upper region of dermis are damaged
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Third degree
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Entrie thickness of skin is damaged
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Burns considered critical if
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25% 2nd degree
10% 3rd degree Third degree on face, hands or feet. |
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3 major types of skin cancer
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Basal cell carcinoma
Squamous cell carcinoma Melanoma |
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Basal cell carcinoma
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Least malignant an most common
Stratum basale cels proliferate and invade dermis/hypodermis. Slow growing Cured by surgery |
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Squamous cell carcinoma
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arises from keratinocytes of S. spinosum most often on scalp, ear, lowerlip. Mets if not removed. Radiation or surgery
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Melanoma
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Most dangerous, highly mets.
rest. to chemo, tx by immunotherapy. chance of surv. slim if 4mm thick |
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Characteristics of Melanoma (ABCD Rule)
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Assymmetry
Border irregular Color is black, brown, tan Diameter greater than 6mm |
