Give the path travelled by a molecule of oxygen when it enters the body.
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The following pathway is travelled by a molecule of oxygen when it enters the body:-
Nostrils→Trachea→Bronchus→Bronchiole→Alveolus→Blood→Tissues.
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The following path is followed by a molecule of oxygen when it inters the body :----->
Nostril --> trachea ----> Bronchus ----> Bronchiole----> Alveolus ---->blood ---->tissue
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