SEARCH Articles Figures Tables Portion of inner epidermis of Onion bulb scale showing cells at various stages of maturity. Young cell the eell has enlarged, larger vacuoles have formed thru the bursting of films of cytoplasm separating smaller ones, and the nucleus has moved toward the cell wall. In 3, the films have all burst, the cytoplasm and nucleus have been pushed up against the cell wall, the nucleus is flattened out, and a large vacuole appears in the center of the cell. [Publishers Imprint]