Your heart beats more than 100,000 times a day. In one 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 it’s ever severely damaged, there's often only one medical solution: replacing it. Roni Shanoada explores how this complex and intricate procedure works. This TED-Ed lesson was directed by Alexia Roider and Zedem Media and narrated by Addison Anderson. After the talk, Shoshana demystifies what happens if you opt to be an organ donor.