> Like most living things, plants breathe in O2 and breathe out CO2 (in addition to photosynthesis which does the opposite).
At what "level" does this happen? Is it similar to an animal with a diaphragm centralizing the intake of oxygen and lungs centralizing distribution to every part of the animal, or more along the lines of cells that are exposed to the air taking in oxygen locally and using it for their own needs?
Plants absorb oxygen, moisture, etc through their stoma found in the stems, roots, and leaves directly into their cells. From there its processed into ATP via the mitochondria just like we would.
At what "level" does this happen? Is it similar to an animal with a diaphragm centralizing the intake of oxygen and lungs centralizing distribution to every part of the animal, or more along the lines of cells that are exposed to the air taking in oxygen locally and using it for their own needs?