![Annotated illustration of human alveoli. The alveoli are air sacs in the lungs, at the ends of the bronchioles, that allow the exchange of carbon diox Stock Photo - Alamy Annotated illustration of human alveoli. The alveoli are air sacs in the lungs, at the ends of the bronchioles, that allow the exchange of carbon diox Stock Photo - Alamy](https://c8.alamy.com/comp/2DHN6EK/annotated-illustration-of-human-alveoli-the-alveoli-are-air-sacs-in-the-lungs-at-the-ends-of-the-bronchioles-that-allow-the-exchange-of-carbon-diox-2DHN6EK.jpg)
Annotated illustration of human alveoli. The alveoli are air sacs in the lungs, at the ends of the bronchioles, that allow the exchange of carbon diox Stock Photo - Alamy
![Frontiers | The Human Endolymphatic Sac and Inner Ear Immunity: Macrophage Interaction and Molecular Expression Frontiers | The Human Endolymphatic Sac and Inner Ear Immunity: Macrophage Interaction and Molecular Expression](https://www.frontiersin.org/files/Articles/410484/fimmu-09-03181-HTML-r1/image_m/fimmu-09-03181-g001.jpg)
Frontiers | The Human Endolymphatic Sac and Inner Ear Immunity: Macrophage Interaction and Molecular Expression
![Draw a diagram of human respiratory system and label - pharynx, trachea, lungs, diaphragm and alveolar sac on it. Draw a diagram of human respiratory system and label - pharynx, trachea, lungs, diaphragm and alveolar sac on it.](https://haygot.s3.amazonaws.com/questions/1498153_1700467_ans_bb150f9beaf84167b6ca75ed5f86cdfd.png)
Draw a diagram of human respiratory system and label - pharynx, trachea, lungs, diaphragm and alveolar sac on it.
![Structure of the Human Lungs. Human Anatomy Stock Vector - Illustration of artery, respiration: 46695749 Structure of the Human Lungs. Human Anatomy Stock Vector - Illustration of artery, respiration: 46695749](https://thumbs.dreamstime.com/z/structure-human-lungs-human-anatomy-air-enters-your-system-bronchi-bronchi-start-bottom-46695749.jpg)
Structure of the Human Lungs. Human Anatomy Stock Vector - Illustration of artery, respiration: 46695749
![Illustration of diseased human alveoli. The alveoli are air sacs in the lungs, at the ends of the bronchioles, that allow the exchange of carbon dioxi Stock Photo - Alamy Illustration of diseased human alveoli. The alveoli are air sacs in the lungs, at the ends of the bronchioles, that allow the exchange of carbon dioxi Stock Photo - Alamy](https://c8.alamy.com/comp/2DHN6EG/illustration-of-diseased-human-alveoli-the-alveoli-are-air-sacs-in-the-lungs-at-the-ends-of-the-bronchioles-that-allow-the-exchange-of-carbon-dioxi-2DHN6EG.jpg)
Illustration of diseased human alveoli. The alveoli are air sacs in the lungs, at the ends of the bronchioles, that allow the exchange of carbon dioxi 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)