Why do blacks have white palms?

Constitutional melanin pigmentation (skin color) and the possibility of tanning in a person are determined by melanocytes, which are specialized skin cells that produce the pigment melanin. This same melanocyte performs a protective, sentry function because the production of melanin is the body’s protective response to ultraviolet radiation. These same melanocytes have a branched shape and the branches are located in different layers of the epidermis, producing pigments synthesized on the basis of melanin: black-brown (eumelanin) and yellow-red (pheomelanin), responsible for coloring the eyes, skin and hair. Melanocytes are found in the pigmented part of the retinal epithelium and the vascular layer of the eyes, in the inner ear and, of course, in the skin. The top layer of the skin is the epidermis, the outer layer of which is the stratum corneum. The thickness of the stratum corneum varies sharply in different parts of the skin, with the greatest thickness of the stratum corneum on the palms and soles, and it is not at all accidental - this is the skin of those parts of the body that constantly rub against the ground and against grasped objects. And melanocytes are found deeper than the stratum corneum. By the way, for the same reason hair does not grow on the feet and palms.

That is, to put it simply, the too thick stratum corneum of the skin epidermis on the feet and palms prevents melanocytes from functioning (secreting melanin)

Other interesting questions and answers

What's the creepiest joke you know?

The father is sitting in the toilet, jerking off. My son comes in and asks

- “Dad, what are you doing?”

- “I’m jerking off son, soon you will too”

- “My hand is tired”

Vadim Avsyuk 776

Why do blacks have white palms?

Why do blacks have whiter palms than the rest of their bodies?

Constitutional melanin pigmentation (skin color) and the possibility of tanning in a person are determined by melanocytes, which are specialized skin cells that produce the pigment melanin. This same melanocyte performs a protective, sentry function because the production of melanin is the body’s protective response to ultraviolet radiation. These same melanocytes have a branched shape and the branches are located in different layers of the epidermis, producing pigments synthesized on the basis of melanin: black-brown (eumelanin) and yellow-red (pheomelanin), responsible for coloring the eyes, skin and hair. Melanocytes are found in the pigmented part of the retinal epithelium and the vascular layer of the eyes, in the inner ear and, of course, in the skin. The top layer of the skin is the epidermis, the outer layer of which is the stratum corneum. The thickness of the stratum corneum varies sharply in different parts of the skin, with the greatest thickness of the stratum corneum on the palms and soles, and it is not at all accidental - this is the skin of those parts of the body that constantly rub against the ground and against grasped objects. And melanocytes are found deeper than the stratum corneum. By the way, for the same reason hair does not grow on the feet and palms.

That is, to put it simply, the too thick stratum corneum of the skin epidermis on the feet and palms prevents melanocytes from functioning (secreting melanin)

Why does the black man have white palms? or are they jerking off or dirty??)))

Nobody knows, which is why British scientists set about solving this problem and even received funding for the next 10 years.

There are no pigment cells there.
The skin of the feet and palms of people of all races differs in structure from the skin on other parts of the body. In particular, there are no hair follicles (therefore there are not even individual hairs), as well as melanocytes - pigment cells that give the skin color. Therefore, these surfaces in all people, regardless of race, have the same color and are unable to tan.