1. Part take air into the body - > start from the nostril sinus (nasal cavity) (pharynx pharynx larynx (larynx) trachea.) (trachea) trachea or hilum (bronchus) bronchiolitis (bronchiole)
2.The resulting gas exchange -- > bronchiolitis gas exchange, a subsidiary of alveoli (pulmonary-alveoli), which makes the gas exchange.
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