Question

our elements that comprise over 95% of the human body are _____. carbon, phosphorus, oxygen, hydrogen calcium, phosphorus, hydrogen, nitrogen carbon, hydrogen, oxygen, nitrogen calcium, hydrogen, oxygen, nitrogen

Answer 1

I believe the correct answer would be the third option. Our elements that comprise over 95% of the human body are carbon, hydrogen, oxygen, nitrogen. Carbon and hydrogen is the backbone of any hydrocarbon or organic compound. The cells in our body are made up organic compounds thus our body is mostly composed of carbon and hydrogen. Oxygen is also present in high percent in our body since it is important for the processes of the cells. Also, nitrogen should be present in our body in large amount since it is present in proteins which is found in our body's cells and tissues.