The subcutaneous tissue or subcutis is the layer of loose connective tissue directly underlying the dermis.[1] It is mainly composed of adipose tissue. Its thickness depends on the amount of fat present.[2] Its physiological function includes insulation and storage of nutrients.
Subcutaneous injections are given by injecting a fluid or a solid pellet into the subcutis. It is used to administer a variety of medical treatments. Subcutaneous injections of fluid are used to administer vaccines and medications. A pellet may be injected to deliver long-lasting doses of medication such as goserelin. Subcutaneous injections provide slow and constant absorption and are one of the parenteral routes of administration.
10.8mg implant syringe for subcutaneous use
A typical injection site post-implant. The entry wound and pellet ejection bruise can clearly be seen here
