Melanin is produced by melanocytes which are located in the bottom layer of the skin's epidermis, the middle layer of the eye, the inner ear, the membranes that envelop the brain and the spinal cord, bones, the inner lining of the vagina, and heart. Melanocytes are central to the healthy development of an embryo. Without melanin, human beings would not be...alive.
1) Session III of The Journey of the Songhai People
2) Melanocyte - Wikipedia
3) Image Chapter 72 Biology of Melanocytes Fitzpatrick's Dermatology in General Medicine, 8e