Cellular Respiration. Ch 7. What is it?. Cellular respiration – the process by which cells make ATP by breaking down organic compounds (sugars and food) ALL CELLS DO THIS! Plants, animals, heterotrophs and autotrophs. Cellular respiration. Occurs in two stages Glycolysis
C6H12O6 + 6O2 6CO2 + 6H2O + ATP
Notice this is the equation for photosynthesis backwards!
Some energy is also given off as heat, the less heat given off means the system is more efficient!