Body Atlas

Meet Your Heart · Heart

How long does one lap of the circulation take?

The network that moves blood around your body.

The simple answer

Blood needs a way to reach every corner of you — so your body runs a delivery network: your heart, your blood, and the vessels it travels through. Together they're called the circulatory system.

Go deeper

Blood carries oxygen and nutrients out to every tissue and carries carbon dioxide and other waste away. The heart provides the push; roughly 100,000 km of vessels provide the roads.

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