Tip Sheet Credibility: 5
|Most of the human body is made up of water, which is a combination of hydrogen and oxygen.As much as 99 per cent of the body is made up of oxygen,carbon, hydrogen,nitrogen,calcium and phosphorus.
Tip Credibility: 5
|Scientists have found a way to create a beating heart in a lab using foreign cells. Search "creating a beating heart" on YouTube.
Tip Credibility: 4
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