optic disc, the small blind spot on the surface of the retina, located about 3 mm to the nasal side of the macula. It is the point where the fibers of the retina leave the eye and become part of the optic nerve.
Adult stem cells are found in many organs and tissues, including the skin. In fact, human skin is the largest repository of adult stem cells in the body. Skin stem cells reside in the basal layer of the epidermis where they remain dormant until they are activated by tissue injury or disease. 1.
Skin stem cells. In everyday life your skin has to cope with a lot of wear and tear. For example, it is exposed to chemicals like soap and to physical stresses such as friction with your clothes or exposure to sunlight.The epidermis and skin appendages need to be renewed constantly to keep your skin in good condition.o far, scientists have identified several different types of skin stem cell: 1  Epidermal stem cells are responsible for everyday regeneration of the different layers of the epidermis. 2  These stem cells are found in the basal layer of the epidermis.