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Module 2d - A&P
Intruduction to the Human Body
Question | Answer |
---|---|
skin color | determined by many factors: some genetic, some physiological, and some due to disease |
melanocytes | deep in the epidermal layer are cells that excrete melanin |
melanin | stains the surrounding cells, causing them to darken the more melanin secreted the darker the skin color |
albinism | melanocytes completely fail to secret melanin |
vitiligo | this conditioninvolves loss of pigment (melanin) in certain areas of the skin causing white patches |
freckles and moles | examples of melanin concentrating in one area |
melanoma | mole that changes forming a malignant melanoma |
carotene | yellow pigment, usually hidden my effects of melanin |
cyanosis | poorly oxygenated blood |
jaundiced | liver disease caused a person unable to excrete a pigment called bilirubin that is then deposited in the skin |
ecchymosis | black and blue area; where blood has escaped blood vessels and clotted under the skin |