Front | Back |
A muscular organ that is constantly pumping blood through your body.
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Heart
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Carries blood mixed with oxygen away from your heart.
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Artery
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Takes the blood cells carrying carbon dioxide back to your heart.
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Vein
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This carries blood to the lower half of your body.
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Inferior vena cava
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This carries blood to the upper half of your body.
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Superior vena cava
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Why does your body need a circulatory system?
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To transport food, oxygen, and nutrients to all the bodies cells. It also carries away waste.
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What do you think happens to a person when the heart valves are not working?
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Blood might flow in the wrong direction.
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How do blood vessels work?
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Red: carry oxygen and carbon dioxide.
White: Fight off germs.
Platelets: Clump together to fix a cut.
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