Which skin layer is also known as the hypodermis?

The subcutaneous layer is indeed synonymous with the hypodermis. This layer lies beneath the dermis and serves several important functions in the body. One of its primary roles is to act as a cushion for underlying tissues and organs, providing insulation and protecting them from mechanical injury. It is composed mainly of loose connective tissue and fat cells (adipocytes), contributing to overall body temperature regulation and energy storage.

The hypodermis also facilitates the attachment of the skin to underlying structures, such as muscles and bones, allowing for flexibility and movement of the skin. Additionally, it plays a significant part in the process of thermoregulation through fat storage, which serves as an insulator against heat loss. Recognizing the hypodermis as the subcutaneous layer is crucial in understanding the overall anatomy and function of the skin.