Lung Alveoli – Location of Alveolar Ducts and Alveolar Sacs

Author: Scott A. Sheffield MS

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A zoom-in of the secondary lobule and alveolar duct

An alveolus with blood supply, duct and sac.
alveoli labeled respiratory bronchiole
An alveolus labeled alevolus ducts
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  • Protruding from the thin walls of the alveolar ducts and respiratory bronchioles are many cup-shaped image descriptionalveoli, each measuring about 0.2 – 0.5 mm in diameter.

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An alveolus with blood supply, duct and sac.
alveoli
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  • At the distal end of an alveolar duct, the alveoli are arranged into grape-like clusters called image descriptionalveolar sac. The alveoli share a common opening to the alveolar duct.
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar Sacs
Alveolar sacs.

An Overview of the Location of Alveolar Ducts and Alveolar Sacs:

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Test Yourself on alveolar ducts and sacs with answers hidden
Test Yourself on lung alveoli - alveolar ducts and sacs with answers shown
Test yourself while observing Alveolar Ducts and Alveolar Sacs
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