The Learning Lab - #AreYouSmarterThanATLLStudent The diagram below shows an air sac in a human lung. Blood moves along the capillary from Position X to Position Y. The blood at X has
![Pulmonary air-sac system in a bird.a, Latex injection (blue) of the... | Download Scientific Diagram Pulmonary air-sac system in a bird.a, Latex injection (blue) of the... | Download Scientific Diagram](https://www.researchgate.net/publication/7730012/figure/fig4/AS:267546427392026@1440799447993/Pulmonary-air-sac-system-in-a-birda-Latex-injection-blue-of-the-pulmonary-system-in-a.png)
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_f1.jpg)