Final answer:
The liver is the only organ in the body known to regenerate.
Step-by-step explanation:
The only organ in the body known to regenerate is the liver. The liver has the remarkable ability to regenerate itself and restore its original size and function even after significant damage. When a part of the liver is removed or injured, the remaining healthy cells in the liver divide and multiply to replace the damaged tissue. This is made possible by the presence of special cells called hepatocytes, which have the ability to divide and regenerate.