Answers

2016-06-23T13:17:34+08:00
It pumps blood and it keeps the blood moving and circulating inside body
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2016-06-23T13:46:54+08:00
The heart act as a pumping machine of blood it is able to do its work with the help of sinoatrial node which is a specialized tissue in the right atrium that generates electrical impulses to allow contraction of the heart muscle as the cardiac muscles contract it then pushes or pumps the blood
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