#alveolus__air_sac__air_cell__aircell a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
supertype: sac a structure resembling a bag in an animal
part of: lung either of two saclike respiratory organs in the chest of vertebrates; serves to remove carbon dioxide and provide oxygen to the blood
part of: lower_respiratory_tract__lowerrespiratorytract the bronchi and lungs
No statement uses or specializes alveolus; click here to add one.