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Membranous Wall of Trachea
Respiratory System

Membranous Wall of Trachea

Paries membranaceus tracheae

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The posterior wall of the trachea is flat and contains fibromuscular tissue, including the involuntary trachealis muscle. It is devoid of tracheal cartilages, which occupy the anterolateral aspects of the tracheal wall. The trachealis muscle is composed of smooth muscle and attaches between the ends of the tracheal cartilages.

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Key Features/Anatomical Relations

The membranous portion is lined posteriorly by the trachealis muscle. These two components sit in front of the esophagus.

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The trachea is a tube that connects the larynx to the distal airways, and its structure includes 16–20 U-shaped rings of hyaline cartilage.

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