photosynthesis makes the glucose that is used in cellular respiration to make ATP while photosynthesis requires carbon dioxide to release oxygen cellular respiration requires oxygen that releases carbon dioxide it is the release oxygen that is used by US and most other organisms for cellular respiration. have a nice day!!!!
Cellular respiration is backwards (C6 H12 O6 + 6 O2 --> 6 CO2+ 6 H2O + Energy). Here, glucose and oxygen are the reactants. With photosynthesis, glucose and oxygen would be the products. Same thing with the products of cellular respiration. Carbon dioxide and water are the products of cellular respiration, while they are the reactants in photosynthesis.
