What tissue is the trachea made from?

What tissue is the trachea made from?

• A. Muscle and epithelial tissue
• B. Bone and connective tissue
• C. Cartilage and smooth muscle
• D. Cartilage and connective tissue

Answer: (C)

The trachea’s wall combines rigid support with a controllable airway. It has rings of hyaline cartilage that keep the airway open, and a layer of smooth muscle on the posterior side (the trachealis) that can contract or relax to adjust airflow. This mix of cartilage and smooth muscle is what gives the trachea both stability and the ability to change its diameter as needed, making cartilage and smooth muscle the best description of its tissue composition. The posterior wall’s muscle is what distinguishes it from a simple cartilage tube, reinforcing why this option fits best.

The trachea’s wall combines rigid support with a controllable airway. It has rings of hyaline cartilage that keep the airway open, and a layer of smooth muscle on the posterior side (the trachealis) that can contract or relax to adjust airflow. This mix of cartilage and smooth muscle is what gives the trachea both stability and the ability to change its diameter as needed, making cartilage and smooth muscle the best description of its tissue composition. The posterior wall’s muscle is what distinguishes it from a simple cartilage tube, reinforcing why this option fits best.