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Because air is trapped in these air sacs, it is difficult for lungs with COPD to deflate like normal l… in 2020 | Copd, Chronic obstructive pulmonary disease, Copd symptoms
![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
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