35 liters of water, 20 kilograms of carbon, 4 liters of ammonia, 1.5 kilograms of calcium oxide, 800 grams of phosphorus, 250 grams of salt, 100 grams of saltpeter, 80 grams of sulfur, 7.5 grams of fluorine, 5 grams of iron and 3 grams of silicon. Plus 15 more items. This is what the body of an average adult is made of.