What is the innermost layer of skin called?

The innermost layer of the skin is called the subcutaneous layer, also known as the hypodermis. This layer is primarily composed of adipose tissue and connective tissue, which helps to insulate the body and protect underlying muscles and bones. It acts as a cushion, absorbing shocks from impacts and providing a pathway for larger blood vessels and nerves to reach the skin.

While the dermis and epidermis are important layers of the skin, they are not the innermost. The epidermis is the outermost layer, which provides a barrier to pathogens and helps regulate water loss. Beneath the epidermis is the dermis, which contains critical structures such as hair follicles, blood vessels, and nerve endings. The subcutaneous layer is distinct from these two, as it mainly functions to connect the skin to underlying tissues and organs, emphasizing its role as the innermost layer.