Melasma Overview. Patches of melasma are darker than other areas of skin because they have more pigment. The cells that produce pigment in the skin are called melanocytes. Ultraviolet radiation, or UV rays, from the sun stimulate melanocytes to produce pigment.
The human testicle .The two muscles that regulate the temperature of the testes are the dartos andcremaster muscles:â¢ Dartos Muscle The dartos muscle is a layer of smooth muscle fibers in the subcutaneous tissue of thescrotum (surrounding the scrotum).
Sweat glands and fatty layers in the skin help to regulate body temperature in mammals. When the outside temperature is high, sweat glands release bodily fluids combined with salt to keep the body... Sweat glands and fatty layers in the skin help to regulate body temperature in mammals. When the outside temperature is high, sweat glands release bodily fluids combined with salt to keep the body... Star Gazing