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How does cellular respiration happen in animal cells?
Animal and plant cells, need oxygen to carry out cellular respiration. Blood cells in the capillaries collect oxygen from air in the alveoli, and nutrients from the small intestine. As capillaries throughout the body come in contact with other body cells, the oxygen and the nutrients diffuse out of the blood cells and into other body cells. Oxygen and sugar enter the cell and once in the cell enter the mitochondria. The mitochondria break down sugar with oxygen, releasing the energy stored in the sugar.