MICROANATOMY

Detailed explanation-1: -Cell division occurs in stratum basale/germinativum.

Detailed explanation-2: -The epidermal layer that exhibits the most rapid cell division is the stratum basale. The stratum basale (basal layer) is the innermost and the deepest layer of the epidermis which consists of rapidly dividing stem cells which produce new epidermal cells (keratinocytes) through mitotic cell division.

Detailed explanation-3: -The innermost basal layer, stratum basale (SB), consists in undifferentiated keratinocytes, stem cells, melanocytes, and Merkel cells. On top of this layer resides the spinous layer, stratum spinosum (SS). The subsequent granular layer, stratum granulosum (SG), consists of 3–5 cell layers.