Digital Histology
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Alveolus

This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x

Alveolar duct <p>This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x</p>

Alveolar duct

This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x
Alveolar lumen <p>This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x</p>

Alveolar lumen

This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x
Interalveolar septa <p>This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x</p>

Interalveolar septa

This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x
Smooth muscle knobs <p>This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x</p>

Smooth muscle knobs

This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x
Capillaries <p>This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x</p>

Capillaries

This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x
Air-blood barrier <p>This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x</p>

Air-blood barrier

This image shows another alveolus attached to an alveolar duct, as indicated by the presence of smooth muscle knobs. Note the large numbers of capillaries in the septum that bulge into the alveolar space. The alveolus is lined by a thin epithelium of Type I cells which, along with the endothelium of the capillaries, form the air-blood barrier. Toluidine blue, 1000x
Main SlideAlveolar ductAlveolar lumenInteralveolar septaSmooth muscle knobsCapillariesAir-blood barrier