Hypodermis

Hypodermis is the deepest layer of the skin, lying below the dermis and above the fascia or fibrous tissue that envelops, separates, or binds together muscles, organs, and other soft structures of the body. The hypodermis is primarily composed of adipose tissue (fat cells), which provide insulation and cushioning for the rest of the body.

Structure

The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which is used as a storage site for fat. The amount of fat in the hypodermis can vary over the body and from person to person. It also contains larger blood vessels and nerves than those found in the dermis. The hypodermis helps to regulate temperature, provides nutritional support to the skin, and acts as a shock absorber to protect the internal organs.

Function

The hypodermis serves several functions in the body, these include:

• Thermal Insulation: The fat present in the hypodermis acts as a thermal insulator, regulating the body temperature by reducing heat loss.

• Shock Absorption: The fat present in the hypodermis also serves as a cushion to protect the underlying tissues and organs from mechanical trauma.

• Energy Storage: The adipose tissue in the hypodermis serves as a storage site for fat, which can be used as an energy source when needed.

Clinical Significance

The hypodermis is the site of subcutaneous injections, as it has a good blood supply and absorbs drugs well. It is also the layer that primarily determines the shape of the body, and a reduction in the amount of fat in the hypodermis can lead to a change in body shape.

See Also

• Skin
• Dermis
• Adipose tissue
• Subcutaneous injection

References

Hypodermis Resources
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