The Circulatory System - The Heart
- Created by: Han2812
- Created on: 06-04-13 12:53
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The Circulatory System - The Heart
The heart is the main organ in the blood circulatory sytem. It contracts to pump blood around the body.
1) Its made of muscle tissue - is a muscle
2) It has valves that make sure the blood goes the right way - doesnt go backwards. They are between…
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