Answer
The three pigments of the skin that contribute to skin color are melanin, carotene and hemoglobin.
Melanin is synthesized in melanocytes. Usually, melanin makes the skin look darker, but it varies in color from yellowish to very dark--almost black.
Carotene is a yellowish to orange-brown pigment that is obvious in palms of hands, and soles of feet.of humans...
The third pigment, hemoglobin, is not really a pigment of the skin, but the oxygen carrying protein molecule of erythrocytes ( red blood cells or RBCs). Where the skin is light enough for it to show through , hemoglobin gives a pinkish to reddish hue to the skin.
Work Step by Step
Melanin is synthesizd in melanocytes from the amino acid tyrosine. There are several types of melanin , for example, eumelanin, pheomelanin and neuromelin,
Melamin is found in har skin and eyes. eumelanin may make the skin look dark nut eumelanin may be brown. Pheomelanin varies in hue from pinkish to reddish.
Carotene imparts a yelowish to reddish brown hue to the skin. This effect is most noticeable in the soles of the feet and the palms of the hands of humans. Vitamin A is derived from Beta carotene.
Hemoglobin is the oxygen-carrying molecule of red blood cells (RBCs). Its effects are most noticeable in fair-skinned or light-skinned persons. This pinkish to reddish hue imparted by hemoglobin is especially noticeable when a fair-skinned person blushes; when the skin of the cheeks becomes flushed in very cold weather ; also when a light-skinned person becomes angry, or hot because of hard physical activity. In each case, blood is brought close to the surface to aid cooling or increase surface warmth. In some cases small capillaries may break and leaked whole blood increase the degree of redness, as observed in the cheeks.
