What are the blunt peg-like formations that cover the surface of the dermis called?

The blunt peg-like formations that cover the surface of the dermis are known as dermal papillae. These structures protrude into the epidermis and play a crucial role in the development of fingerprints and skin texture. Dermal papillae increase the surface area between the dermis and epidermis, enhancing the exchange of nutrients and oxygen. Additionally, they contain capillaries and touch receptors, providing both nourishment to the epidermis and sensory function for the skin.

In contrast, hair follicles are the structures from which hair grows and do not cover the dermal surface. Keratinocytes are the predominant cell type found in the epidermis that produces keratin, a protein that gives skin its protective qualities. Skin appendages include various structures such as sweat glands, sebaceous glands, and hair follicles, but they do not specifically refer to the peg-like formations on the dermis.