What is the hypodermis primarily composed of?

The hypodermis, also known as the subcutaneous layer, is primarily composed of loose connective tissue and adipose tissue. This layer serves as a crucial interface between the skin and underlying structures such as muscles and bones, providing insulation and cushioning for the body. The loose connective tissue allows for flexibility and mobility, while the adipose tissue plays a key role in energy storage, thermal insulation, and protection of the underlying tissues from external trauma.

This combination supports the skin's function in temperature regulation and acts as a shock absorber, enhancing the overall protective function of the integumentary system. Furthermore, the hypodermis contains larger blood vessels and nerves than the dermis, facilitating the supply of nutrients and sensory functions, making its composition particularly suited for these roles.