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Skin contains how many layers?
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epidermis
- protective covering of the body (outer layer)
- does not have blood or nerve supply (depends on dermis for nutrients)
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dermis
deeper layer containing nerves and blood vessels
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most important layers of epidermis
stratum corneum, basal layer
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stratum corneum
composed of dead, flat cells
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basal layer
- only layer containing living cells
- where new cells are continuously being produced
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dermatitis
inflammation of the skin
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hypodermic needle
inserted under the skin
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subcutaneous
pertaining to under the skin
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melanocytes
specialized cells in basal layer that produce a black pigment (melanin)
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albinism
absence of pigment in the skin, eyes and hair due to the inability to produce melanin
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