GENERAL KNOWLEDGE

Detailed explanation-1: -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-2: -Oxygen is the most abundant element in the human body, accounting for about 65% of a person’s mass. Each water molecule is made up of two hydrogen atoms bonded to one oxygen atom, but the mass of each oxygen atom is much larger than the combined mass of the hydrogen.

Detailed explanation-3: -The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you. They are found throughout your body, mostly as water but also as components of biomolecules such as proteins, fats, DNA and carbohydrates.

Detailed explanation-4: -By mass, about 96 percent of our bodies are made of four key elements: oxygen (65 percent), carbon (18.5 percent), hydrogen (9.5 percent) and nitrogen (3.3 percent).