The trachea is kept open by?

The trachea is structurally supported by cartilage rings, which are C-shaped structures made of hyaline cartilage. These rings provide rigidity and keep the trachea open, ensuring that it remains patent (open) during breathing. The open part of the C-shaped rings faces the esophagus, allowing some flexibility for swallowing. This anatomical design is essential because it enables the trachea to maintain its shape and prevent collapse, even when the pressure within it changes during the respiratory cycle. The presence of these cartilage rings is vital for the proper function of the respiratory system, as it allows for the unobstructed passage of air to and from the lungs.