GENERAL KNOWLEDGE

Detailed explanation-1: -Oxygen is the most abundant element contained within living organisms, composing about 65% of the whole-body mass.

Detailed explanation-2: -Oxygen is the most common element in the human body, comprising approximately 65.0% of body mass. Most of the oxygen present is found in the form of water.

Detailed explanation-3: -#1: Oxygen Oxygen is by far the most abundant element in the Earth’s crust, making up 46% of mass-coming up just short of half of the total. Oxygen is a highly reactive element that combines with other elements, forming oxides.

Detailed explanation-4: -Oxygen is the third most abundant element in the universe after hydrogen and helium (by mass) and it’s the most abundant element (by mass) in the Earth’s crust, making up almost half of the crust’s mass.

Detailed explanation-5: -Those four elements are oxygen, carbon, hydrogen and nitrogen. So what, exactly, do these elements do? Oxygen definitively holds first place, making up 65% to 67% of the human body by weight, Townsend said. That’s because our bodies are mostly water-around 50% to 60%-so most of the oxygen is the “O” in H2O.