Subcutis
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The distribution of the bloodvessels in the skin of the sole of the foot. (Subcutaneous tissue is labeled at bottom left.) |
The
subcutis is the layer of tissue directly underlying the
cutis. It is mainly composed of
adipose tissue. Its physiological function includes insulation and storage of nutrients. Directly below the subcutis is usually a layer of
muscle (covered in a
fascia) or
bone (covered in
periosteum).
Subcutaneous (abbr:
subq)
injections are given by injecting a fluid into the subcutis. It is relatively painless and an effective way to administer particular types of medication. Certain
depot injections, such as
goserelin, are a solid or oil-based medication which is administered subcutaneously where it releases its agent slowly over a period of weeks.
The dermis rests on this layer, sometimes referred to as the
hypodermis. It consists of loose connective tissue and large amounts of adipose tissue (fat). This is the body's insulation and energy reserve. Continuous bundles of elastic fibers connect the subcutaneous tissue with the dermis. The blood vessels that supply the skin and help regulate body temperature run through the subcutaneous layer. This layer also contains nerves and nerve endings.
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Hypodermis*
Subcutaneous emphysema
