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Skin Color Factors

Skin Color Factors. Melanin - Pigment in skin, eyes, hair Carotene - a copper-colored pigment Skin Thickness Reflection of Blood Vessels. Skin Color Distribution. Why? Natural Selection. Reduces frequency of skin cancer

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Skin Color Factors

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  1. Skin Color Factors • Melanin - Pigment in skin, eyes, hair • Carotene - a copper-colored pigment • Skin Thickness • Reflection of Blood Vessels

  2. Skin Color Distribution

  3. Why? Natural Selection • Reduces frequency of skin cancer • Reduces likelihood of severe sunburn which interferes with sweating • Melanin screens sunlight passing through skin • Regulates Vit. D. Production • Which Regulates deposition of Calcium • Too Much> Calcification of soft tissues • Too Little> Rickets; Reduced Size of Birth Canal

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