Trachealis muscle
Trachealis Muscle
The Trachealis muscle (pronunciation: /trəˈkiːəlɪs ˈmʌsəl/) is a smooth muscle that bridges the gap between the free ends of C-shaped cartilages at the posterior wall of the trachea, forming a part of the fibroelastic membrane of the trachea.
Etymology
The term "Trachealis" is derived from the Greek word "tracheia," meaning "rough" or "windpipe," and the Latin term "alis," which means "pertaining to." The muscle is named for its location along the trachea.
Anatomy
The Trachealis muscle is a longitudinal smooth muscle, located on the posterior aspect of the trachea. It connects the ends of the C-shaped tracheal cartilages. This muscle plays a significant role in controlling the diameter of the trachea to regulate airflow.
Function
The primary function of the Trachealis muscle is to constrict or relax the trachea, thereby controlling the flow of air to and from the lungs. It also provides support to the tracheal walls, preventing them from collapsing.
Related Terms
- Trachea: The windpipe; a tube that connects the pharynx and larynx to the lungs, allowing the passage of air.
- Smooth Muscle: A type of muscle tissue which is used by various systems to apply pressure to vessels and organs.
- Cartilage: A resilient and smooth elastic tissue, a rubber-like padding that covers and protects the ends of long bones at the joints.
- Fibroelastic Membrane: A type of connective tissue that provides support and flexibility to certain structures in the body.
External links
- Medical encyclopedia article on Trachealis muscle
- Wikipedia's article - Trachealis muscle
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