Which layer of skin is responsible for the generation of new cells?

The epidermis is the outermost layer of the skin and is primarily responsible for the generation of new skin cells. Within the epidermis, there is a deeper layer known as the stratum basal (or stratum germinativum), where keratinocytes (the main type of skin cell) are continuously produced. As these new cells form, they push older cells toward the surface, where they eventually die off and are shed.

The other layers have different functions. The dermis, for example, provides structural support and houses blood vessels, nerves, and hair follicles, but it does not generate new skin cells like the epidermis does. The subcutaneous layer, located beneath the dermis, consists mainly of fat and connective tissue, serving as insulation and cushioning for the body but not involved in cell generation. The stratum corneum is the outermost layer of the epidermis, composed of dead keratinized cells that protect the underlying layers but do not generate new cells. Thus, the epidermis plays a crucial role in skin renewal and regeneration.