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).
What part in the male body regulates sperm temperature? I would say it is several bodily functions that do. The human is a warm blooded creature and this is because his heart pumps blood around the body. Because the sperm is produc â¦ ed inside of the male body, it has the same temperature, however core temperature often differs from the temperature of different organs or different areas inside the body, that is why seamen may seem a little hotter than the body.