Which type of graft involves using tissue from a different species?

A graft that involves using tissue from a different species is referred to as a xenograft. This type of graft is commonly utilized in situations where human donor tissue is not available or when immediate surgery is required. An example of a xenograft is the use of porcine (pig) heart valves in human patients. The key aspect of a xenograft is that it comes from a completely different species, which presents unique immunological challenges.

In contrast, an allograft involves tissue taken from a human donor of the same species, and an autograft uses the patient's own tissue. A fasciocutaneous graft refers specifically to skin and underlying fascia, which can be either autograft or allograft, but does not include the concept of using tissue from a different species. Thus, recognizing the distinction of xenografts in providing tissue solutions during surgical procedures clarifies why this choice is the correct answer.