Ihonalaiskerros

The ihonalaiskerros, also known as the hypodermis or subcutaneous tissue, is the deepest layer of the skin. It lies beneath the dermis and is primarily composed of loose connective tissue and adipose tissue (fat). The main function of the hypodermis is insulation, helping to regulate body temperature by trapping heat. It also serves as an energy reserve, storing fat that the body can utilize for fuel.

This layer acts as a shock absorber, protecting the underlying organs and bones from physical trauma. The hypodermis also connects the skin to the underlying fascia, the fibrous tissue that encloses muscles, bones, and organs, providing a degree of mobility between the skin and deeper structures. Blood vessels and nerves also run through the hypodermis, supplying nutrients to the skin and enabling sensory perception. The thickness of the hypodermis varies considerably across the body and between individuals, depending on factors such as genetics, diet, and sex. It is generally thicker in areas where fat is stored, such as the abdomen, buttocks, and thighs.