Which layer of skin is primarily composed of collagen and elastin fibers?

The dermis is the layer of skin that is primarily composed of collagen and elastin fibers. This layer is situated beneath the epidermis and is crucial for providing strength, elasticity, and support to the skin. Collagen fibers are responsible for the skin's structural integrity, while elastin fibers allow the skin to stretch and return to its original shape. Together, these components create a resilient framework that is essential for various skin functions, including maintaining hydration, temperature control, and housing important structures like blood vessels and hair follicles.

The hypodermis, which lies beneath the dermis, mainly consists of fat and connective tissue and serves primarily as insulation and energy storage. The epidermis, on the other hand, is the outermost layer of skin and does not contain collagen or elastin, as its main function is to provide a protective barrier. The stratum corneum is the outermost sublayer of the epidermis, consisting of dead skin cells that have lost their nuclei and contain no collagen or elastin fibers, serving primarily a protective role.