What are the percentage contribution of the different Elements in the Human Body ?

Most of the human body is made up of water, H₂O, with cells consisting of 65-90% water by weight. Therefore, it isn't surprising that most of a human body's mass is oxygen. Carbon, the basic unit for organic molecules, comes in second. 99% of the mass of the human body is made up of just six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.

1. Oxygen (61%)
2. Carbon (23%)
3. Hydrogen (10%)
4. Nitrogen (2.6%)
5. Calcium (1.4%)
6. Phosphorus (1.1%)
7. Potassium (0.20%)
8. Sulfur (0.20%)
9. Sodium (0.14%)
10. Magnesium (0.027%)
11. Copper, Zinc, Selenium, Molybdenum, Fluorine, Chlorine, Iodine, Manganese, Cobalt, Iron (0.70%)
12. Lithium, Strontium, Aluminum, Silicon, Lead, Vanadium, Arsenic, Bromine (trace amounts)