Which layer of the skin stores fat and provides insulation?

The hypodermis, also known as the subcutaneous layer, is the layer of skin that stores fat and provides insulation. This layer is located beneath the dermis and is composed primarily of loose connective tissue and adipose tissue, which serves as a fat reservoir. The adipose tissue within the hypodermis performs several important functions, including energy storage, thermal insulation, and cushioning for underlying structures such as muscles and bones.

In addition to fat storage and insulation, the hypodermis plays a role in anchoring the skin to underlying tissues while allowing for the flexibility and movement of the skin covering. Its vascular system also helps regulate temperature by facilitating the flow of blood.

The other layers mentioned—dermis, epithelium, and stratum corneum—do not primarily serve the function of fat storage or insulation. The dermis lies above the hypodermis and is involved in sensory perception and the structural integrity of the skin. The epithelium refers to the outermost layer of the skin, which is protective but does not store fat. The stratum corneum is the outermost part of the epidermis and consists of dead skin cells that help protect the skin but do not provide insulation through fat