What is the purpose of a graft in surgical procedures?

The primary purpose of a graft in surgical procedures is to replace diseased tissue with healthy tissue. Grafting involves taking healthy tissue from one part of the body (or from a donor) and implanting it into an area where the tissue is damaged, diseased, or missing. This process can help restore function, improve structure, and promote healing in the affected area. Grafts are commonly used in various surgeries, including reconstructive surgeries, skin grafts for burn victims, and heart bypass surgeries, where healthy blood vessels are used to reroute blood around blocked arteries.

The other options do not accurately represent the specific function of a graft. While destroying diseased tissue, rebuilding a body part, or closing a wound may be associated with surgical procedures in general, they do not specifically define the role of a graft, which is explicitly to replace unhealthy or absent tissue with something that is viable and capable of functioning properly.