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.
â¢ spaces in between cells allow fluid from vessels in the dermis to. nourish the cells (epidermis is avascular!) â¢ Langerhans cells (involved in the immune system) found here. stratum germinativum (basalis) â¢ contains stem cells from which new keratinocytes arise by mitosis. a) these cells are relatively small, cuboidal to low columnar. b) look for mitotic cells with basophilic appearance. â¢ melanocytes are dendritic cells that synthesize melanin.