Article: Blood.

In the time it takes you to read this, your blood has traveled all around your body. You have lots of blood in you - about 3 to 4 liters. Adults have about 5 liters of blood. Compare this to a large soft drink bottle, which holds 2 liters of liquid.

How does blood get around?

Blood travels all around your body. How does it get around? Your heart pumps it through tubes called blood vessels. There are 2 kinds of vessels. Arteries take blood away from your heart. Veins bring blood back to your heart, so it can be pumped again.

What's in your blood?

Do you know what's in your blood? Blood is a liquid with many solid parts floating in it. ...

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