Biology, 23.10.2019 11:00 isabelperez063
Which of the following is the correct flow of oxygen in the human body? 1. oxygen moves from the alveolus and enters the blood stream to capillaries. 2. air moves down through the trachea to the lungs. 3. blood full of oxygen moves to the heart and then out to body cells. 4. breathing in air through nose and mouth. 5. air moves to alveolus in the lungs.
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