Final answer:
The trachea is lined by 16-20 C-shaped rings of hyaline cartilage that provide support and maintain the airway open, allowing for efficient respiration.
Step-by-step explanation:
The trachea, also known as the windpipe, connects the larynx to the lungs and is essential for the passage of air through the respiratory tract. It is supported by 16-20 C-shaped rings of hyaline cartilage, which provide structural support and prevent the trachea from collapsing. Along with the cartilaginous rings, the trachea features the trachealis muscle and a fibroelastic membrane that allow it to stretch and expand slightly during breathing movements. This combination of structures is vital for maintaining an open airway for the respiratory system to function effectively.