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Pulmonary air-sac system in a bird.a, Latex injection (blue) of the... | Download Scientific Diagram
![Multimedia Gallery - Pulmonary air-sac systems of dinosaurs and birds exhibit striking similarities | NSF - National Science Foundation Multimedia Gallery - Pulmonary air-sac systems of dinosaurs and birds exhibit striking similarities | NSF - National Science Foundation](https://www.nsf.gov/news/mmg/media/images/dino_bird_h1.jpg)
Multimedia Gallery - Pulmonary air-sac systems of dinosaurs and birds exhibit striking similarities | NSF - National Science Foundation
![The New York Times on Twitter: "Human lungs are made up of millions of microscopic, balloon-shaped air sacs called alveoli, the workhorse of the respiratory system, where the exchange of gases takes The New York Times on Twitter: "Human lungs are made up of millions of microscopic, balloon-shaped air sacs called alveoli, the workhorse of the respiratory system, where the exchange of gases takes](https://pbs.twimg.com/media/EXg95QMXgAElcIA.jpg:large)
The New York Times on Twitter: "Human lungs are made up of millions of microscopic, balloon-shaped air sacs called alveoli, the workhorse of the respiratory system, where the exchange of gases takes
![Gross morphological features of the air sacs of the hooded crow (Corvus cornix) - El‐Sayed - 2020 - Anatomia, Histologia, Embryologia - Wiley Online Library Gross morphological features of the air sacs of the hooded crow (Corvus cornix) - El‐Sayed - 2020 - Anatomia, Histologia, Embryologia - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/3a9713c1-cbed-4de6-83ed-99548313c5ee/ahe12504-fig-0003-m.jpg)