D4K: The Heart
Special | 29m 5s Video has closed captioning.
The heart shape is the symbol of love, but a real heart looks nothing like a valentine. Today, we know your heart is a muscle, the most important muscle in your body. Over an average lifetime, the heartbeats more than two and a half billion times! Learn more. Cardiologists Dr. Eric Carter and Dr. Eloisa Walker answer students’ questions about the heart.
Problems Playing Video? | Closed Captioning