Alveolar duct
The wall of an alveolar duct, seen here at higher magnification, consist entirely of alveoli separated by thin interalveolar septa, capped by knobs with smooth muscle cells. The alveolar wall contains numerous capillaries for gas exchange with inspired air. 500x
Alveoli
The wall of an alveolar duct, seen here at higher magnification, consist entirely of alveoli separated by thin interalveolar septa, capped by knobs with smooth muscle cells. The alveolar wall contains numerous capillaries for gas exchange with inspired air. 500x
Alveolar septa
The wall of an alveolar duct, seen here at higher magnification, consist entirely of alveoli separated by thin interalveolar septa, capped by knobs with smooth muscle cells. The alveolar wall contains numerous capillaries for gas exchange with inspired air. 500x
Knobs
The wall of an alveolar duct, seen here at higher magnification, consist entirely of alveoli separated by thin interalveolar septa, capped by knobs with smooth muscle cells. The alveolar wall contains numerous capillaries for gas exchange with inspired air. 500x
Capillaries
The wall of an alveolar duct, seen here at higher magnification, consist entirely of alveoli separated by thin interalveolar septa, capped by knobs with smooth muscle cells. The alveolar wall contains numerous capillaries for gas exchange with inspired air. 500x
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