1. respiration is for animals, and phtosynthesis is for vegetals, bacteria and algae.
2. We (animals) use respiration because our cells need a process called gas exchange ( we take Oxygen from the air and exchange it in our cells for carbon dioxide)
3. This is possible for us because our cells have organs called mitocondria, while vegetal cells have chloroplasts.
4.Photosynthesis is an important biochemical process in which plants, algae, and some bacteria harness the energy of sunlight to produce food. Ultimately, nearly all living things depend on energy produced from photosynthesis for their nourishment, making it vital to life on Earth. It is also responsible for producing the oxygen that makes up a large portion of the Earth's atmosphere. Organisms that produce energy through photosynthesis are called photoautotrophs. Half of all photosynthesis comes not from plants, but from bacteria and algae.
Resìration involves the use of developed organs such as lungs.
5. Photosynthesis produces energy from sun light, while
respiration produces energy from the Oxygen present in pur atmospheric air.