Trachea
The trachealis muscle is smooth muscle that spans the opening between the ends of each cartilage ring. Contraction of the muscle constricts the trachea thereby aiding in coughing by increasing airflow velocity. Its flexibility also facilitates swallowing by allowing the esophagus to expand. Mixed gland frequently accumulate next this muscle. 100x
Trachea lumen
The trachealis muscle is smooth muscle that spans the opening between the ends of each cartilage ring. Contraction of the muscle constricts the trachea thereby aiding in coughing by increasing airflow velocity. Its flexibility also facilitates swallowing by allowing the esophagus to expand. Mixed gland frequently accumulate next this muscle. 100x
Cartilage ring
The trachealis muscle is smooth muscle that spans the opening between the ends of each cartilage ring. Contraction of the muscle constricts the trachea thereby aiding in coughing by increasing airflow velocity. Its flexibility also facilitates swallowing by allowing the esophagus to expand. Mixed gland frequently accumulate next this muscle. 100x
Trachealis muscle
The trachealis muscle is smooth muscle that spans the opening between the ends of each cartilage ring. Contraction of the muscle constricts the trachea thereby aiding in coughing by increasing airflow velocity. Its flexibility also facilitates swallowing by allowing the esophagus to expand. Mixed gland frequently accumulate next this muscle. 100x
Mixed glands
The trachealis muscle is smooth muscle that spans the opening between the ends of each cartilage ring. Contraction of the muscle constricts the trachea thereby aiding in coughing by increasing airflow velocity. Its flexibility also facilitates swallowing by allowing the esophagus to expand. Mixed gland frequently accumulate next this muscle. 100x
Image source >
This image was taken of a slide in the Duke University collection.
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