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Bronchiole

Larger bronchioles are lined by respiratory epithelium. Numerous longitudiinal elastic fibers continue in the lamina propria. The spiraling smooth muscle layer reaches its greatest relative thickness in bronchioles. No cartilage nor mixed glands persist at this level. 200x, 400x

Epithelium <p>Larger bronchioles are lined by respiratory epithelium. Numerous longitudiinal elastic fibers continue in the lamina propria. The spiraling smooth muscle layer reaches its greatest relative thickness in bronchioles. No cartilage nor mixed glands persist at this level. 200x, 400x </p>

Epithelium

Larger bronchioles are lined by respiratory epithelium. Numerous longitudiinal elastic fibers continue in the lamina propria. The spiraling smooth muscle layer reaches its greatest relative thickness in bronchioles. No cartilage nor mixed glands persist at this level. 200x, 400x

Lamina propria <p>Larger bronchioles are lined by respiratory epithelium. Numerous longitudiinal elastic fibers continue in the lamina propria. The spiraling smooth muscle layer reaches its greatest relative thickness in bronchioles. No cartilage nor mixed glands persist at this level. 200x, 400x </p>

Lamina propria

Larger bronchioles are lined by respiratory epithelium. Numerous longitudiinal elastic fibers continue in the lamina propria. The spiraling smooth muscle layer reaches its greatest relative thickness in bronchioles. No cartilage nor mixed glands persist at this level. 200x, 400x

- Smooth muscle <p>Larger bronchioles are lined by respiratory epithelium. Numerous longitudiinal elastic fibers continue in the lamina propria. The spiraling smooth muscle layer reaches its greatest relative thickness in bronchioles. No cartilage nor mixed glands persist at this level. 200x, 400x </p>

- Smooth muscle

Larger bronchioles are lined by respiratory epithelium. Numerous longitudiinal elastic fibers continue in the lamina propria. The spiraling smooth muscle layer reaches its greatest relative thickness in bronchioles. No cartilage nor mixed glands persist at this level. 200x, 400x

Mucociliary layer > <p>Glands throughout the respiratory passages release mucoserous secretory product onto the epithelial surfaces. These secretions prevent the passageways from drying and also sequester inhaled foreign particles. Cilia embedded in this secretory layer sweep the secretions and particulate matter towards the pharynx.</p>

Mucociliary layer >

Glands throughout the respiratory passages release mucoserous secretory product onto the epithelial surfaces. These secretions prevent the passageways from drying and also sequester inhaled foreign particles. Cilia embedded in this secretory layer sweep the secretions and particulate matter towards the pharynx.

Main Slide Epithelium Lamina propria - Smooth muscle Mucociliary layer >