Respiratory System Anatomy - Major Zones & Divisions
Lung Alveoli – Location of Alveolar Ducts and Alveolar Sacs
- The respiratory bronchioles inside a secondary pulmonary lobule gives rise to two or more alveolar ducts.
- Protruding from the thin walls of the alveolar ducts and respiratory bronchioles are many cup-shaped alveoli, each measuring about 0.2 – 0.5 mm in diameter.
- At the distal end of an alveolar duct, the alveoli are arranged into grape-like clusters called alveolar sac. The alveoli share a common opening to the alveolar duct.
An Overview of the Location of Alveolar Ducts and Alveolar Sacs:
Test yourself while observing Alveolar Ducts and Alveolar Sacs