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Transcript
The Circulatory System
by Emilee Green
Introduction to the circulatory system
Your circulatory system has three main parts:
- Heart which pumps blood around your body.
- Blood vessels which carry the blood.
- Blood.
Heart Chambers
The Heart
Your heart is a very strong muscle which contracts (gets smaller) and relaxes to pump blood around your body. A heart beat varies from person to person - for an average person it beats 60-100 times a minute. You feel this when you feel your pulse
Aorta
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The Blood Vessels
Blood vessels carry blood. There are three types:
- Arteries carry blood away from the heart.
- Veins carry blood back to the heart.
- Capillaries are tiny vessels which carry blood into your organs and tissues.
Blood Vessels
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white blood cell
The blood
Blood is made from four parts:
- Red blood cells which transport oxygen.
- White blood cells which protect against disease.
- Blood platelets which help the blood to clot and form scabs to repair a cut.
- Plasma which is a yellowy liquid that carries these cells and important nutrients around your body.
red blood cell
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