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O2 O2 O2 O2 O2 O2 O2 O2 O2 O2 tissue capillary alveoli O2 O2 O2 CO2 O2 O2 O2 Gas Exchange Process 1. Inhale O2 into lungs 2. CO2 is a waste product of cellular Respiration (C6H12O6 + 6O2 6CO2 + 6 H2O + ATP ) 3. CO2 is removed from the cell through the cell membrane and into the capillary. 4. Blood travels throughout the body and the capillaries are picking up CO2 from the cell and carries it to the lungs 5. When CO2 in the blood arrives in the lungs it is exhaled 6. At the same time O2 from the alveoli moves into the capillary and is transported throughout the body to the cell