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.
Like other stem cells which reside in pre-natal, adult tissues and organs, mesenchymal stem cells (MSCs; also known as multipotent mesenchymal stromal cells) are capable of self-renewal and multipotential differentiation.etal membranes and tissues as an MSC source: The umbilical cord and perinatal tissue are rich sources of stem cells. Multipotent stem cells have been found in the chorion, placenta, amnion, amniotic fluid, and in the tissue surrounding the umbilical cord vessels, i.e., Wharton's jelly, and in the umbilical cord itself.