What are six most abundant elements that occur in living organisms?
Oxygen is the most abundant element in the earth’s crust and in the body. The body’s 43 kilograms of oxygen is found mostly as a component of water, which makes up 70% of total body weight. Oxygen is also an integral component of all proteins, nucleic acids (DNA and RNA), carbohydrates, and fats. Rubidium is the most abundant element in the body (0.68 g) that has no known biological role (silicon, which is slightly more abundant, may or may not have a metabolic function).Element Mass of element in a 70-kg person Volume of purified element Element would comprise a cube this long on a side: oxygen 43 kg 37 L 33.5 cm carbon 16 kg 7.08 L 19.2 cm hydrogen 7 kg 98.6 L 46.2 cm nitrogen 1.8 kg 2.05 L 12.7 cm calcium 1.0 kg 645 mL 8.64 cm phosphorus 780 g 429 mL 7.54 cm potassium 140 g 162 mL 5.46 cm sulfur 140 g 67.6 mL 4.07 cm sodium 100 g 103 mL 4.69 cm chlorine 95 g 63 mL 3.98 cm magnesium 19 g 10.9 mL 2.22 cm iron 4.2 g 0.53 mL 8.1 mm fluorine 2.6 g 1.72 mL 1.20 cm zinc 2.3 g 0.32 mL 6.9 m
