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Trachea and primary bronchus

Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x

Epithelium <p>Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x</p>

Epithelium

Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x
Basement membrane <p>Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x</p>

Basement membrane

Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x
Lamina propria <p>Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x</p>

Lamina propria

Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x
Elastic lamina <p>Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x</p>

Elastic lamina

Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x
Submucosa <p>Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x</p>

Submucosa

Beneath the lamina propria, elastic fibers become more numerous forming a distinct elastic lamina, separating the lamina propria and submucosa. The elastic lamina provides structural support to maintain patency and also allows for expansion and passive recoil during the inhalation-exhalation cycle. 200x
Main SlideEpitheliumBasement membraneLamina propriaElastic laminaSubmucosa