![Alveoli (air sacs) massively increase the surface area of the lungs for diffusion. | Body systems, Idiopathic pulmonary fibrosis, Respiratory system Alveoli (air sacs) massively increase the surface area of the lungs for diffusion. | Body systems, Idiopathic pulmonary fibrosis, Respiratory system](https://i.pinimg.com/originals/0d/df/8d/0ddf8db066ff2a85bcf500b988100d05.jpg)
Alveoli (air sacs) massively increase the surface area of the lungs for diffusion. | Body systems, Idiopathic pulmonary fibrosis, Respiratory system
![Mayo Clinic on Twitter: Mayo Clinic on Twitter:](https://pbs.twimg.com/media/DrxHTOzX0AAsi1T.jpg)
Mayo Clinic on Twitter: "#Pneumonia is an infection that inflames the air sacs in one or both lungs. Learn more about this serious lung infection and how to keep you and your
![Epithelial hyperplasia (arrow) on the mucosal surface of the air sac... | Download Scientific Diagram Epithelial hyperplasia (arrow) on the mucosal surface of the air sac... | Download Scientific Diagram](https://www.researchgate.net/profile/Ayse_Kilic11/publication/289917473/figure/fig4/AS:667788293201933@1536224544292/Epithelial-hyperplasia-arrow-on-the-mucosal-surface-of-the-air-sac-from-a-chicken.png)
Epithelial hyperplasia (arrow) on the mucosal surface of the air sac... | Download Scientific Diagram
![Diagram Showing The Pulmonary Alveolus (air Sacs) In The Lung Royalty Free Cliparts, Vectors, And Stock Illustration. Image 15915102. Diagram Showing The Pulmonary Alveolus (air Sacs) In The Lung Royalty Free Cliparts, Vectors, And Stock Illustration. Image 15915102.](https://previews.123rf.com/images/blueringmedia/blueringmedia1210/blueringmedia121000039/15915102-diagram-showing-the-pulmonary-alveolus-air-sacs-in-the-lung.jpg)