The alveoli (tiny air sacs whose walls are covered with minuscule blood vessels) remove carbon dioxide from the blood, releasing it into the lung to be breathed out, and also absorb oxygen, transferring it into the blood.
(tiny air sacs; are covered; with minuscule blood vessels) (The alveoli; remove; carbon dioxide; from the blood) Context(The alveoli remove,List([0, 87))):(The alveoli; remove carbon dioxide releasing; it; into the lung) (The alveoli; also absorb; oxygen; transferring it into the blood)
The alveoli remove,List([0, 87))
tiny air sacs The alveoli The alveoli The alveoli
are covered remove remove carbon dioxide releasing also absorb
with minuscule blood vessels
carbon dioxide from the blood
it into the lung
oxygen transferring it into the blood