"Subcutaneous" refers to the layer of tissue located just beneath the skin. This layer contains fat and connective tissue, which help insulate the body and protect underlying muscles and organs. It plays a crucial role in storing energy and regulating temperature. In medical contexts, "subcutaneous" often describes the method of administering injections. For example, insulin is commonly given via subcutaneous injections, allowing for slower absorption into the bloodstream compared to intramuscular injections. This method is frequently used for medications that require gradual release.