In the first stage, in the cytoplasmic matrix, one molecule of glucose is decomposed into two molecules of pyruvate, and four [H](activated hydrogen) are removed simultaneously; There's a small amount of energy that's released when glucose is broken down, and some of that energy is used to synthesize ATP, to produce a small amount of ATP, which doesn't require oxygen
In the matrix of the second order of acetone acid into the mitochondria, the hydrogen in the two points of pyruvate and 6 hydro particles are taken off, and the 20 of the two of the two, the pyruvate is decomposed into carbon dioxide. Release a small amount of energy in the process. This phase does not require oxygen participation.
In the third phase of the lining of the net granule, 24 of the previous two stages of the process of absorption or chloroplast photosynthesis are combined with oxygen to release a large amount of energy, which requires oxygen participation.