Inputs of Cellular respiration are <span>Oxygen (6O</span>₂)<span> and Glucose (C</span>₆<span>H</span>₁₂<span>O</span>₆)<span> Outputs of Cellular respiration are </span><span>Carbon Dioxide, water, ATP or energy The main purpose of cellular respiration is to produce ATP. It takes place in the mitochondria. ATP is the energy of the cells so that it can properly functions inside the body.