Final answer:
Rete pegs, also known as rete ridges, are interdigitations between the epidermis and dermis layers of the skin, found at the dermoepidermal junction. They increase the surface area of contact between the two layers, providing a stronger bond and aiding in nutrient exchange. These structures are more pronounced in areas of the body that experience higher stress.
Step-by-step explanation:
Rete pegs, also known as rete ridges, refer to the interdigitations between the epidermis and dermis layers of the skin. These structures are found at the dermoepidermal junction. The epidermis, the outermost layer of skin, projects down into the dermis forming the rete pegs, while the dermal tissue extends upwards into the epidermis forming what are called dermal papillae. This interlocking pattern increases the surface area of contact between the two layers, enhancing the bond and facilitating the exchange of nutrients and waste products.
The presence of rete pegs is an important aspect of skin architecture, and they are particularly pronounced in areas of high stress, such as the palms of the hands and the soles of the feet. As humans age, the rete pegs may flatten, which can contribute to the appearance of aged skin and a reduced ability of the skin to resist shear forces without injury.