When you (16)breathe in, your (17)diaphragm first (18)helps your lungs to get (19)bigger. As a result, the (20)airflow into your nose or mouth, through your trachea, and into your lungs. This air has oxygen, which your body needs to (21)live. Next, the oxygen in your lungs passes into the (22)capillaries, which then carry blood to the (23)pulmonaria vein. This vein then takes the blood to the left side of your heart. Your heart pumps this blood into tubes (24)called arteries, which then carry oxygen to all of the cells in your body.

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When you (16)breathe in, your (17)diaphragm first (18)helps your lungs to get (19)bigger. As a result, the (20)airflow into your nose or mouth, through your trachea, and into your lungs. This air has oxygen, which your body needs to (21)live. Next, the oxygen in your lungs passes into the (22)capillaries, which then carry blood to the (23)pulmonaria vein. This vein then takes the blood to the left side of your heart. Your heart pumps this blood into tubes (24)called arteries, which then carry oxygen to all of the (25)cells in your body.

16. breathe

17. diaphragm

18. helps

19. bigger

20. airflow

21. live

22. capillaries

23. pulmonaria

24. called

25. cells