When the blood arrives in the lungs, it pushes carbon dioxide molecules into the airway and absorbs oxygen molecules from the airway.
(the blood; arrives; in the lungs) (it; pushes; carbon dioxide molecules; T:When the blood arrives in the lungs) (it; absorbs; oxygen molecules; from the airway; T:When the blood arrives in the lungs)
the blood it it
arrives pushes absorbs
in the lungs
carbon dioxide molecules T:When the blood arrives in the lungs
oxygen molecules from the airway T:When the blood arrives in the lungs