Skin is primarily attached to the underlying tissue known as the subcutaneous tissue, or hypodermis, which lies beneath the dermis (the inner layer of the skin). The subcutaneous tissue is made up of loose connective tissue and fat (adipose tissue), and it serves several important functions:
- Insulation: The fat in this layer helps to insulate the body, regulating temperature.
- Cushioning: It acts as a protective padding for underlying muscles and bones.
- Anchoring: The subcutaneous tissue helps anchor the skin to underlying structures, such as muscles and bones, while still allowing for some movement.
- Blood Supply: It contains larger blood vessels and nerves that supply the skin.
Together, the skin (epidermis and dermis) and the underlying subcutaneous tissue form an important interface between the body and the external environment, providing protection, sensation, and regulation.