what is the purpose of the rings of cartilage in the wall of the trachea
Trachea. The trachea is a wide flexible tube, the lumen of which is kept open by 20 tracheal cartilages, which are C-shaped rings of hyaline cartilage. The gaps between the rings of cartilage are filled by the trachealis muscle-a bundle of smooth muscle, and fibroelastic tissue.he trachea is a wide flexible tube, the lumen of which is kept open by 20 tracheal cartilages, which are C-shaped rings of hyaline cartilage. The gaps between the rings of cartilage are filled by the trachealis muscle-a bundle of smooth muscle, and fibroelastic tissue.