Answer: airsac

AnswerCrossword Clue
AIRSAC

Alveolus

AIRSAC

Respiratory cavity

AIRSAC

Bird's buoyancy aid

AIRSAC
Lung compartment
AIRSAC
Lung cell
AIRSACBird's organ
AIRSACHollow space in birds
AIRSACPart of the lung
AIRSACBird's breathing aid
AIRSACBird's breathing apparatus
AIRSACCanary's cavity
AIRSACAvian lung outgrowth
AIRSACHollow part of a bird
AIRSACLung feature
AIRSACBird's temperature regulator aid
AIRSACBird's body feature