Which of the following organs is NOT typically donated?

The brain is not typically donated for transplantation purposes like the heart, kidneys, or liver. Organ donation usually focuses on organs that can be surgically removed and transplanted to patients in need of a functioning organ. The heart, kidneys, and liver are all vital organs that can be preserved and transplanted to prolong or save the life of a recipient.

In contrast, the brain is a complex organ necessary for all bodily functions and cannot be transplanted in the same way. While brain tissue can sometimes be used for research or in certain specialized medical situations, it is not viable for organ donation as it cannot serve the same purpose as the other listed organs. Understanding the limitations and medical criteria for organ donation can clarify why the brain is excluded from this process.