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melanocyte
The melanocytes in the epidermis produce the pigments that protect the skin from UV rays.
As with most animals, the function of the integumentary system is to serve as a protection barrier. It also produces necessary vitamin D and produces pigment to protect from the sun's harmful rays.
Adaotation of skin cells to prevent damage from UV rays, it is the pigment in the skin that becomes darker, not the skin tissue itself
chlorophyll
Melanin
melanin is mainly responsible for the color of skin number of melanin decide the color more the number more darker skin it protect from the sun rays and other foreign substance in white skin less melanin is there
Anything above the temperature of zero degrees produces infrared rays, that means that even humans do !!
Skin color is determined by a chemical in the skin called Melanin. This is a pigment that protects the skin from UV rays. The higher concentration of Melanin people have, the darker their skin looks.
Our skin contains pigment forming cells that secrete melanin, the pigment that imparts brown color to skin. When harmful UV rays fall into skin, secretion this pigment melanin increase which inturn saves our skin from damaging UV rays. Thus getting brown in sun is protective mechanism of skin to save from UV rays.This is also the reason why people with white skin sunburn more frequently!!!
The choroid layer in the eye has a black color pigment on it. Also, the light entering the eye is not reflected because light rays entering the pupil are absorbed by the tissues inside the eye.
You are thinking of Melanocytes. Which contain and create the melanin. The melanin is the pigment which then makes them appear dark.