Last Modified: December, 2009. (J. Crimando)
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Respiratory Histology - Normal Lung

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This view shows a BRONCHIOLE (left) and blood vessel (right) in cross-section as well as numerous ALVEOLI in normal lung at 100X magnification.

The bronchiole inner membrane is composed of pseudostratified columnar epithelial tissue. Portions of hyaline cartilage rings can also be seen outside of the bronchiole.

By comparison, this blood vessel has simple squamous epithelial lining, thick smooth muscle wall and no cartilage portions.

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