Final answer:
Xenograft is the procedure that uses skin from another species, whereas autografts and allografts (homografts) involve self-tissue or tissue from another individual within the same species, respectively.
Step-by-step explanation:
The skin graft procedure that uses skin from another species is known as a xenograft. An autograft is when tissue is transplanted from one area of an individual's body to another area of the same individual's body. An allograft, also referred to as a homograft, is a transplant from one genetically distinct individual to another within the same species. A xenograft involves tissue transplanted from an animal to a human, which can cause a strong immune response leading to transplant rejection due to the recognition of the tissue as foreign by the host's immune system, particularly by the major histocompatibility complex markers, such as MHC I and MHC II. This recognition can activate cytotoxic T cells and helper T cells that target and kill the grafted cells.