![Annotated illustration of diseased human alveoli. The alveoli are air sacs in the lungs, at the ends of the bronchioles, that allow the exchange of ca Stock Photo - Alamy Annotated illustration of diseased human alveoli. The alveoli are air sacs in the lungs, at the ends of the bronchioles, that allow the exchange of ca Stock Photo - Alamy](https://c8.alamy.com/comp/2DHN6E2/annotated-illustration-of-diseased-human-alveoli-the-alveoli-are-air-sacs-in-the-lungs-at-the-ends-of-the-bronchioles-that-allow-the-exchange-of-ca-2DHN6E2.jpg)
Annotated illustration of diseased human alveoli. The alveoli are air sacs in the lungs, at the ends of the bronchioles, that allow the exchange of ca Stock Photo - Alamy
![The diagram illustrates the healthy trachea and air sacs of the human lungs highlighted with black lines for easy viewing. 8288533 Vector Art at Vecteezy The diagram illustrates the healthy trachea and air sacs of the human lungs highlighted with black lines for easy viewing. 8288533 Vector Art at Vecteezy](https://static.vecteezy.com/system/resources/previews/008/288/533/original/the-diagram-illustrates-the-healthy-trachea-and-air-sacs-of-the-human-lungs-highlighted-with-black-lines-for-easy-viewing-vector.jpg)
The diagram illustrates the healthy trachea and air sacs of the human lungs highlighted with black lines for easy viewing. 8288533 Vector Art at Vecteezy
![Alveoli (air sacs) massively increase the surface area of the lungs for diffusion. | Respiratory system, Biology diagrams, Medical assistant student Alveoli (air sacs) massively increase the surface area of the lungs for diffusion. | Respiratory system, Biology diagrams, Medical assistant student](https://i.pinimg.com/736x/0d/df/8d/0ddf8db066ff2a85bcf500b988100d05--surface-area-the-surface.jpg)