Cohesion between the dermis and epidermis is primarily due to which structure?

Cohesion between the dermis and epidermis is primarily attributed to rete ridges. These are interdigitate structures that extend from the dermis into the epidermis, helping to anchor the two layers together. This interlocking not only provides structural stability but also increases the surface area for nutrient exchange and contributes to the overall strength of the skin.

In addition to their role in structural integrity, rete ridges also play a critical role in the nourishment of the epidermis, as they contain blood vessels and nerves that support the epidermal layer. The strength of this connection is vital for maintaining skin health and resilience against physical stresses.

While dermal papillae are also involved in reinforcing the connection between these skin layers, they are a specific type of structure lying at the tips of the rete ridges. Sebaceous glands and muscle fibers do not contribute to the cohesion between the dermis and epidermis. Sebaceous glands are associated with hair follicles and primarily function in oil secretion, while muscle fibers play a role in skin elasticity and movement but do not directly affect the integrity of the dermal-epidermal junction.