Digital Histology
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Alveolar duct

Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x

Alveoli <p>Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x</p>

Alveoli

Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x
Interalveolar septa <p>Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x</p>

Interalveolar septa

Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x
- Knobs <p>Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x</p>

- Knobs

Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x
- Epithelium <p>Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x</p>

- Epithelium

Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x
- Smooth muscle <p>Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x</p>

- Smooth muscle

Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x
- Capillaries <p>Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x</p>

- Capillaries

Closely spaced alveoli forming the wall of alveolar ducts are separated by thin interalveolar septa capped by knobs containing smooth muscle. The smooth muscle forms a sphincter-like ring around the opening of each alveolus and is lined by a simple cuboidal epithelium, without cilia or club cells. The interalveolar septum possesses numerous capillaries where gas exchange occurs. 800x
Image source <p>The image was taken of a slide in the University of New England College of Osteopathic Medicine collection.</p>

Image source

The image was taken of a slide in the University of New England College of Osteopathic Medicine collection.
Main SlideAlveoliInteralveolar septa - Knobs - Epithelium - Smooth muscle - CapillariesImage source