Melanin Definition Anatomy

Dark skinned people have more melanin in their skin than light skinned people have. Melanin is brown non refractile and finely granular with individual granules having a diameter of less than 800 nanometers.

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Melanin is produced by cells called melanocytes.

Melanin definition anatomy. It comes in two basic forms. In heavily pigmented lesions dense aggregates of melanin can obscure histologic detail. Melanocytes are melanin producing cells located in the bottom layer the stratum basale of the skins epidermis.

Exposure to the uv rays of the sun or a tanning salon causes melanin to be manufactured and built up in keratinocytes as sun exposure stimulates keratinocytes to secrete chemicals that stimulate melanocytes. Dark skinned individuals produce more melanin than those with pale skin. Melanin is a pigment that is produced by cells known as melanocytes in the skin of most animals.

Melanin definition is any of various black dark brown reddish brown or yellow pigments of animal or plant structures such as skin or hair. It provides some protection again skin damage from the sun and the melanocytes increase their production of melanin in response to sun exposure. Eumelanin brownish color and pheomelanin reddish brown color.

Although darker skinned people have slightly more melanocytes than those who are light skinned the distribution of melanin in the higher levels of the epidermis contributes to their skin color. Medical definition of melanin. The pigment that gives human skin hair and eyes their color.

This differentiates melanin from common blood breakdown pigments which are larger chunky and refractile and range in color from green to yellow or red brown.

What Is Melanin Definition Production Function Video