The trachea is made of C shaped rings of cartilage, this maintains the shape of the trachea.
cartilage
cartilage rings
trachea is also called wind pipe.it is common passage for both food and air.it is kept open by rings.these are of specialised rings which are of "c" shaped .these are made up of cartilage.so, trachea is kept open by 'c' shaped specialised cartilagenous rings. these are made up of special type of cartilage called fibrous cartilage
The trachea.
the trachea is held open by rings of cartilages
trachea has cartilage rings which it open all the time
the cartilage is important because it open trachea all the time.
To hold something permanently open (such as the trachea, which is held open for breathing by rings of cartilage).
cartilage rings provides support to the trachea that why it open all the time
They are to keep the trachea patent (open) even with low intratracheal air pressures
trachea
epiglottis