Rutgers Anatomy & Physiology Test Practice

The subcutaneous layer, also known as the hypodermis, is primarily characterized by its higher abundance of adipose tissue compared to the dermis. This layer consists of loose connective tissue and fat cells, which play essential roles in insulation, energy storage, and cushioning for the underlying structures such as muscles and bones.

The presence of this adipose tissue not only distinguishes the subcutaneous layer from the dermis but also contributes to its overall function. It helps absorb shocks, protect internal organs, and regulate body temperature by providing insulation. The composition of the subcutaneous layer is crucial in terms of storing energy and providing a reserve during periods of caloric deficit.

Unlike the dermis, which is made up of dense connective tissue that includes collagen and elastin fibers providing strength and elasticity to the skin, the subcutaneous layer is more focused on serving as a connective bridge between the skin and underlying structures while supporting the skin itself.