Final answer:
A skin graft from the patient's own body is known as an autograft, which is less prone to rejection since the immune system recognizes the tissue as its own.
Step-by-step explanation:
A skin graft from the patient's own body is called an autograft. This biological procedure involves transplanting tissues from one part of the body to another part of the same individual. Autografts are highly beneficial for reducing the risk of transplant rejection, as the immune system recognizes the tissue as self and does not attack it.
This contrasts with other types of grafts, such as allografts, isografts, and xenografts, where tissue is taken from a genetically different individual, an identical twin, or a different species, respectively, and which carry higher risks of rejection due to immune system responses to perceived foreign tissue. Matching donor's and recipient's tissues, particularly the MHC (HLA) genes, is crucial in minimizing the risk of rejection in non-autograft transplants.