dermal papillae

Dermal papillae are small, finger-like projections that extend from the dermis (the skin's inner layer) into the epidermis (the outer layer). They provide surface area and support for the epidermis, helping to strengthen the connection between the two layers. In the skin, dermal papillae also contain blood vessels that supply nutrients and oxygen to epidermal cells, promoting healthy skin and healing. In hair follicles, dermal papillae play a crucial role in hair growth regulation by interacting with surrounding cells. Overall, they are essential for skin structure, nourishment, and proper function.