when you breath in, exhale, inhale, when you breath out, exhale, inhale, large muscle below your lungs, heart, ribs, diaphragm, intercostal muscles, number 1 is, ribcage, trachea, pharynx, bronchus, number 2 is, ribcage, trachea, pharynx, bronchus, number 3 is, ribcage, trachea, pharynx, bronchus, number 4 is, ribcage, trachea, pharynx, bronchus, number 5 is, ribcage, alveolus, diaphragm, lung, number 6 is, ribcage, alveolus, diaphragm, lung, number 7 is, ribcage, alveolus, diaphragm, lung, In which structure is carbon dioxide from the blood exchanged for oxygen?, bronchioles, alveolus, trachea, pharynx

respiratory system

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