| 释义 |
- See also
Air sac generally refers to an organ or portion of an organ containing air within an animal's respiratory system. It may refer specifically to: - Pulmonary alveolus, small hollow cavities which are a part of the lungs within mammals
- Air sacs, structures in the saurischian dinosaur respiratory system, including the extant bird respiratory system
See also - {{section link|Lung|Reptiles}}
{{disambiguation}} |