definitions
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| integumentary system | or skin has been called both a membrane, b/c it covers the body, and an organ, because it contains several kinds of tissue
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| epidermis | the outermost layer of skin
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| dermis | this layer has a framework of elastic connective tissue and contains blood vessel,lymphvessels,nerves,involuntary muscle,sweat and oil glands, and hair follicles.
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| subcutaneous fascia | the innermost layer.it is made of elastic and fibrous connective tissue and adipose(fatty) tissue and connects the skin to underly muscles.
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| sudoriferous glands | (sweet gland) are coiled tubes that extend through the dermis and open on the surface of the skin at pores.
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| sebaceous glands | are oil glands that usually open onto hair follicles
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| dilate | enlarge or expand to make bigger
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| alopecia | baldness
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| constrict | to contact or narrow tomake larger
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| albino | a person with an absence of color pigmentsskin has a pinkish tint and the hair is pale yellow or white
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| erythema | is a reddish color of the skin that can causedby either burnsor a congestion of blood in the vessel
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| jaundice | a yellow discoloration of thr skin can indicate bile in the blood as a result of liver or gallbladder disease
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| cyanosis | is a blush discoloration of the skin caused by insufficient oxygen
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| macules | flat spots on the skin such as freckles
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| papules | firm raised areas such as pimples and the eruptions seen in some stages of chicken pox and syphilis
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| vesicles | blisters or fluidfilled sacs such as those seen in chicken pox
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| pustules | pus-filled sacs such as those seen in acne or pimples
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| crusts | areas of dried pus and blood commonly callled "scabs"
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| wheals | itchy elevated areas with an irregular shape hives and insect bites are examples
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| ulcer | a deep loss of skin surface that may extend into the dermis may cause periodic bleeding and the formation of scars
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