Bronchi

Bronchi are intrapulmonary passages that are part of the conducting portion of the respiratory system. As bronchi branches from the primary bronchus, they become smaller in diameter and their wall thins. Cartilage plates and mixed glands remain, distinguishing these passages from bronchioles. 100x

Bronchi are intrapulmonary passages that are part of the conducting portion of the respiratory system. As bronchi branches from the primary bronchus, they become smaller in diameter and their wall thins. Cartilage plates and mixed glands remain, distinguishing these passages from bronchioles. 100x

Bronchi are intrapulmonary passages that are part of the conducting portion of the respiratory system. As bronchi branches from the primary bronchus, they become smaller in diameter and their wall thins. Cartilage plates and mixed glands remain, distinguishing these passages from bronchioles. 100x

Bronchioles are also components of the intrapulmonary conducting system, but lack cartilage plates.

The outlined area shows a respiratory passageway that is transitioning from a bronchus (bottom) to a bronchiole (top). The tissue between is a tangential section through the wall of the passageway showing mixed glands. Note the lack of cartilage in the wall of the bronchiole.

These vessels are pulmonary arteries which lie adjacent to the respiratory passageways and travel with them down to level of the alveoli. Unlike most arteries, pulmonary arteries carry deoxygenated blood.

These vessels are pulmonary arteries which lie adjacent to the respiratory passageways and travel with them down to level of the alveoli. Unlike most arteries, pulmonary arteries carry deoxygenated blood.

This image was taken of a slide in the University of Michigan slide collection.