The cartilaginous rings in a pigs trachea are incomplete. These rings are responsible for supporting the trachea of the pig when it breathes in and out. Without these rings the pig would be in danger of having their throat collapse.
Trachea contain cartilage rings, and is the long tube that goes to the lungs. The bronchi contain cartilage plates and are the branching tubes that go to the lungs.
This is very good question. Which haunted me for decades. If you have no cartilage, then your larynx and bronchi will collapse. If you have full cartilage ring, then your bronchi can not get constricted. Incomplete rings of cartilage has solved the problem. Your bronchi and trachea do not collapse and can constrict also.
the cartilage is important because it open trachea all the time.
cartilage rings give support to trachea to open all the time
The trachea (windpipe) is the tube in the neck with rings of cartilage. It connects the larynx (voice box) to the bronchi, allowing air to pass in and out of the lungs. The rings of cartilage help to keep the trachea open and prevent it from collapsing.
The rings of cartilage that surround the trachea provide structural support, preventing the trachea from collapsing and maintaining an open airway for proper breathing. They also protect the trachea from external compression or pressure.
What keeps the trachea open are small cartilage ring, called cricoid cartilage.
The trachea is a firm cartilaginous tube and is a self supporting structure
protect trachea from external shock and also prevent it of collapsing The open portion of the C-shaped rings is posterior (toward the back). The back of the trachea has a tough but flexible membrane covering the spaces. This permits food boluses (big wads of food) to pass through the esophagus, which is behind the trachea. Even a large chunk of food in the expandable esophagus will not completely press the trachea closed.
In the trachea there are rings of cartilage in a C shape
cricoid cartilageThyroid Cartilage
trachea has cartilage rings which it open all the time