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.
STEM CELL INTRO. Ordinary cells in your body replicate to make new cells of the same type - blood cells make more blood cells, skin cells make more skins cells and so on. However, there is another type of cell, called a stem cell. Stem cells are able to repair or replace damaged tissue. This is why scientists and doctors are so excited about the growing role of stem cells to treat disease, injury, and the deterioration of tissue due to aging.