Science Trek

D4K: The Heart

Special | 29m 5s

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.

Aired: 02/21/06

Rating: TV-G

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The Laura Moore Cunningham Foundation