Pulmonary capillaries
The interalveolar septum is seen by light microscopy (left) and electron microscopy (right). Alveolar capillaries, supplied by the pulmonary artery, protrude from the interalveolar septum into the lumen of the alveolus, thus maximizing the surface area across which gas exchange can occur. 1500x, 4000x
Alveolar lumens
The interalveolar septum is seen by light microscopy (left) and electron microscopy (right). Alveolar capillaries, supplied by the pulmonary artery, protrude from the interalveolar septum into the lumen of the alveolus, thus maximizing the surface area across which gas exchange can occur. 1500x, 4000x
Interalveolar septa
The interalveolar septum is seen by light microscopy (left) and electron microscopy (right). Alveolar capillaries, supplied by the pulmonary artery, protrude from the interalveolar septum into the lumen of the alveolus, thus maximizing the surface area across which gas exchange can occur. 1500x, 4000x
Alveolar (pulmonary) capillaries
The interalveolar septum is seen by light microscopy (left) and electron microscopy (right). Alveolar capillaries, supplied by the pulmonary artery, protrude from the interalveolar septum into the lumen of the alveolus, thus maximizing the surface area across which gas exchange can occur. 1500x, 4000x
Air-blood barrier
The interalveolar septum is seen by light microscopy (left) and electron microscopy (right). Alveolar capillaries, supplied by the pulmonary artery, protrude from the interalveolar septum into the lumen of the alveolus, thus maximizing the surface area across which gas exchange can occur. 1500x, 4000x
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