Now, the trachea is also known as our windpipe, and a trachea contains these cartilage rings that essentially allow the trachea to remain open and not to constrict. Now, the trachea eventually moves all the way down to this intersection and intersect. It basically bifurcates. It forms these two bronchi. We have the right bronchus and our left bronchus. And each one of these bronchies essentially terminate within each one of our two lungs.