The trachea, commonly known as the windpipe, is a vital tube-like structure that connects the larynx to the bronchi, allowing air to pass into the lungs. It is composed of C-shaped cartilage rings that maintain its open shape, ensuring unobstructed airflow during breathing. The trachea also contains mucous membranes and cilia that help trap and expel foreign particles from the respiratory tract, playing a crucial role in respiratory health.