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The Heart in Action
1.The heart a living pump tahat never gets tired...4
2.The heart makes blood move around the body...6
3.Blood travels trough a system of blood vessels...8
4.Three types of blood vessel perform different tasks...10
5.The heartbeat cycle pushes blood thriught the heart...12
6.The heart beats faster during exercise...14
7.The heart has its own blood supply system...16
8.Blood contains different types of cells...18
9.Red bloods cells carry oxygen...20
10.White blood cells wounds bleeding...24
11.The lymphatic system supports the blood system...26
12.The blood lymphatic system protect against infection...28
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