The products of photosynthesis (glucose and oxygen) are used in cellular respiration. The products of cellular respiration (water, and carbon dioxide ) are used in photosynthesis.
This is true because the cycle goes to Oxygen Glucose then Cellular Respiration to Carbon Dioxide Water then to photosynthesis. This cycle is like this because Photosynthesis converts carbon dioxide and water into oxygen and glucose. All in a cycle :)
