TIME heart

VIDEO: Here’s How Your Heart Actually Works

In a short video, Edmond Hui explains how the human hearts actually pumps blood

The heart has baffled scientists for centuries, and its inner workings still confuse a lot of people. So Dr. Edmond Hui set out to make a video that would explain it in clear terms once and for all.

In the video above, Edmond Hui retraces how scientists used to think the heart worked compared to how it actually works.

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