Labels:cell | earth | giraffe | sky OCR: ALVEOLUS N ALVEOLUS is a tiny air- filled (the size ofa tennis court) for the sac in your lungs where oxygen transfer these gases between the and carbon dioxide are exchanged. lungs and blood. They cluster. like You have about 600 million buncl hes of graj pes, at the end alveoli. which provide a large area air passages called bronchioles. Bronchiole Alveolus bunches lled
