Respiration is the most important biochemical reaction which releases energy in the cells. When we breathe in air, oxygen enters our lungs. It binds itself to haemoglobin present in red cells and is carried to millions of cells present on the body. Respiration occurs in these cells and is accompanied by the combustion of glucose producing carbon dioxide water and heat energy.
`underset("Glucose")(C_(6)H_(12)O_(6)(s)) + 6O_(2)(g) to 6CO_(2)(g) + 6H_(2)O(l) + 2820 kj`
