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.
The discovery by Japanâs Shinya Yamanaka, MD, PhD, in 2006, of how to transform ordinary adult skin cells into cells that, like embryonic stem cells, are capable of developing into any cell in the human body, has revolutionized stem cell research. At top, Robert Blelloch, MD, PhD, performs stem cell research.