In the latest Ted-Ed animated short, educator Edmond Hui teams up with animator Anton Bogaty to explain the often misunderstood inner-workings of the human heart.
For most of history, humans had no idea what purpose the heart served. In fact, the organ so confused Leonardo da Vinci that he gave up studying it.
Included in the lesson is method for experimenting at home, should you have a fresh sheep heart handy.