yer and an inner layer of
             cells that will eventually become the placental tissues and the fetal tissues respectively. Once a
             cell begins to differentiate, however, its totipotonic status is lost and the cells are now referred to
             as pluripotent. Pluripotency refers to a cell that differentiates into most tissues and is itself
             partially differentiated. Several stem cell types exist in the body that have the purpose of
             proliferating and differentiating in order to replace or replenish very specific tissues.
             ...