Which body organ can usually be successfully transplanted?

The kidney is one of the organs that can typically be transplanted with success due to several factors. It is often in high demand because many individuals suffer from kidney failure, which can be caused by conditions such as diabetes or hypertension. The surgical techniques for kidney transplantation have become highly refined, and the success rates are generally high, particularly when matched with suitable donors.

Moreover, kidneys can be transplanted from living donors or deceased donors, providing flexibility in sourcing the organ. The post-operative care and medication regimens have also improved, allowing for better management of transplant rejection and complications.

In contrast, while the spleen can sometimes be removed, it is not commonly transplanted due to its role in immune function and the complexities involved in its transplantation. The urethra is typically not transplanted as a whole organ since it does not function independently and is usually part of reconstructive surgeries. The liver can also be successfully transplanted; however, it presents different challenges, such as the need for a larger donor pool and the complexity of the surgery itself, which may make kidney transplants more common in practice.