They are called corns.
The ridges of the stratum germinativum are called dermal papillae. These structures help anchor the epidermis to the dermis and play a role in increasing surface area for nutrient exchange between the layers.
The epidermal layer. (below that is the acellular dermal layer)
It takes anywhere from 15 to 30 days for cells to migrate from the stratum germinativum to the stratum corneum.
stratum germinativum is also know as stratum basale
stratum basale
Stratum Germinativum
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The layer of the epidermis that is constantly undergoing mitosis is called the stratum basale, also known as the basal layer. This layer is responsible for producing new skin cells that eventually move up through the other layers of the epidermis.
papillary
The layer that contains the mitotic viable cells of the epidermis is the stratum basale (basal layer). This layer is responsible for constant cell renewal through mitotic division. Cells in this layer eventually differentiate and move upward through the epidermis to form the outer layers of the skin.
The two strata collectively known as the stratum germinativum are the stratum basale and the stratum spinosum. The stratum basale is the deepest layer of the epidermis, responsible for the generation of new skin cells, while the stratum spinosum provides strength and flexibility to the skin. Together, they play a crucial role in the skin's regeneration and overall health.