Your heart beats more than 100,000 times a day. In just a minute, it pumps over five liters of blood throughout your body. But unlike skin and bones, the heart has a limited ability to repair itself. So if this organ is severely damaged, there’s often only one medical solution: replacing it.

Dig into the science of how heart transplants happen, how donors are matched and find out how this complex surgery saves lives.

[TED Ed]