Oldest human transplant is

Options

A. Kidney transplant
B. Liver transplant
C. Heart transplant
D. Corneal grafting

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the oldest human transplant. We need to identify which type of transplant is considered the oldest among humans.

2. **Types of Transplants**: Transplants can be classified into different categories:
- **Autograft**: Tissue transplanted from one site to another on the same individual.
- **Isograft**: Tissue transplanted between genetically identical individuals (e.g., identical twins).
- **Allograft**: Tissue transplanted between genetically different individuals of the same species.
- **Xenograft**: Tissue transplanted from one species to another (e.g., pig to human).

3. **Identifying the Oldest Human Transplant**: The transcript mentions that the oldest interspecific transplant (between species) was a liver transplant from a pig to a human. However, since the question specifies human transplants, we focus on isografts.

4. **Corneal Isograft**: The transcript indicates that the oldest successful human transplant is the corneal isograft. The cornea is unique because it does not have a blood supply, making it easier to transplant without rejection.

5. **Conclusion**: Based on the information provided, the correct answer to the question is that the oldest human transplant is the corneal isograft.

**Final Answer**: The oldest human transplant is the corneal isograft.

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