![1. Alveoli are air sacs in the lungs where gas exchange occurs with the blood. The tissue that makes up alveoli is simple squamous epithelium, which is different than the respiratory tract 1. Alveoli are air sacs in the lungs where gas exchange occurs with the blood. The tissue that makes up alveoli is simple squamous epithelium, which is different than the respiratory tract](https://homework.study.com/cimages/multimages/16/403_epithelial_tissue2328907734377936491.jpg)
1. Alveoli are air sacs in the lungs where gas exchange occurs with the blood. The tissue that makes up alveoli is simple squamous epithelium, which is different than the respiratory tract
![Micrographs of lung tissue at 3 and 6 months (H&E). A & B. Normal lung... | Download Scientific Diagram Micrographs of lung tissue at 3 and 6 months (H&E). A & B. Normal lung... | Download Scientific Diagram](https://www.researchgate.net/publication/204287922/figure/fig1/AS:630769361891336@1527398543877/Micrographs-of-lung-tissue-at-3-and-6-months-H-E-A-B-Normal-lung-tissue-showed.png)
Micrographs of lung tissue at 3 and 6 months (H&E). A & B. Normal lung... | Download Scientific Diagram
![A photomicrograph of (a) group I lung tissues showing normal alveolar... | Download Scientific Diagram A photomicrograph of (a) group I lung tissues showing normal alveolar... | Download Scientific Diagram](https://www.researchgate.net/publication/337620452/figure/fig1/AS:837354193444865@1576652205506/A-photomicrograph-of-a-group-I-lung-tissues-showing-normal-alveolar-sacs-AS-alveoli.png)
A photomicrograph of (a) group I lung tissues showing normal alveolar... | Download Scientific Diagram
![Alveoli Alveolar Sacs Normal Lung Tissue 50x At 35mm Shows Alveoli Alveolar Sacs The The Thin Alveolar Walls Adapted For Gas Exchange High-Res Stock Photo - Getty Images Alveoli Alveolar Sacs Normal Lung Tissue 50x At 35mm Shows Alveoli Alveolar Sacs The The Thin Alveolar Walls Adapted For Gas Exchange High-Res Stock Photo - Getty Images](https://media.gettyimages.com/id/139821638/photo/alveoli-alveolar-sacs-normal-lung-tissue-50x-at-35mm-shows-alveoli-alveolar-sacs-the-the-thin.jpg?s=1024x1024&w=gi&k=20&c=zpMrAeuXRXlzxIr2MnUxutl2kAExluTcgZs7paAcR4M=)
Alveoli Alveolar Sacs Normal Lung Tissue 50x At 35mm Shows Alveoli Alveolar Sacs The The Thin Alveolar Walls Adapted For Gas Exchange High-Res Stock Photo - Getty Images
![Computer illustration showing human lung anatomy and a light micrograph of a section through healthy lung tissue showing alveoli (air sacs, white). The alveoli are the site of gaseous exchange, where oxygen Computer illustration showing human lung anatomy and a light micrograph of a section through healthy lung tissue showing alveoli (air sacs, white). The alveoli are the site of gaseous exchange, where oxygen](https://c8.alamy.com/comp/PBD4EK/computer-illustration-showing-human-lung-anatomy-and-a-light-micrograph-of-a-section-through-healthy-lung-tissue-showing-alveoli-air-sacs-white-the-alveoli-are-the-site-of-gaseous-exchange-where-oxygen-enters-the-blood-and-carbon-dioxide-is-removed-PBD4EK.jpg)
Computer illustration showing human lung anatomy and a light micrograph of a section through healthy lung tissue showing alveoli (air sacs, white). The alveoli are the site of gaseous exchange, where oxygen
![Text-book of normal histology: including an account of the development of the tissues and of the organs. ternal surface being additionally covered by thepleura. By the division of the terminal bronchial Text-book of normal histology: including an account of the development of the tissues and of the organs. ternal surface being additionally covered by thepleura. By the division of the terminal bronchial](https://c8.alamy.com/comp/2CEG226/text-book-of-normal-histology-including-an-account-of-the-development-of-the-tissues-and-of-the-organs-ternal-surface-being-additionally-covered-by-thepleura-by-the-division-of-the-terminal-bronchial-tube-into-the-alveolarducts-and-the-subsequent-origin-from-these-of-the-infundibula-andthe-air-sacs-the-part-of-the-jjulmonary-parenchyma-in-communica-tion-with-a-single-terminal-bronchiole-forms-a-pyramidal-masswhose-apex-corresponds-to-the-terminal-bronchus-and-whosebase-when-reaching-the-free-surface-appears-as-one-of-the-polygo-nal-areas-markingfig-288-the-exterior-of-thelung-the-2CEG226.jpg)
Text-book of normal histology: including an account of the development of the tissues and of the organs. ternal surface being additionally covered by thepleura. By the division of the terminal bronchial
![Textbook of normal histology: including an account of the development of the tissues and of the organs . s large glands, a relationalso seen in the particularly well developedsebaceous sacs connected with Textbook of normal histology: including an account of the development of the tissues and of the organs . s large glands, a relationalso seen in the particularly well developedsebaceous sacs connected with](https://c8.alamy.com/comp/2AKB60A/textbook-of-normal-histology-including-an-account-of-the-development-of-the-tissues-and-of-the-organs-s-large-glands-a-relationalso-seen-in-the-particularly-well-developedsebaceous-sacs-connected-with-the-fine-hairson-the-nose-and-the-face-the-group-of-aciniis-usually-placed-on-the-side-towards-whichthe-hairs-slope-and-occupies-the-interval-be-tween-the-hair-follicle-and-the-arrector-pilimuscle-the-contractions-of-the-latter-aidingin-the-expulsion-of-the-secretion-of-the-gland-the-sebaceous-glands-are-sometimessimple-but-usually-small-compound-saccularstructures-possessing-short-ducts-2AKB60A.jpg)