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Overview of the Respiratory System

Author(s): Center for Educational Outreach, Baylor College of Medicine


The trachea is a tube, supported by C-shaped rings of cartilage, that connects the larynx with the lungs. It separates into right and left bronchi, one of which enters each lung. Inside the lungs, the bronchi further subdivide into bronchioles that deliver air into blind-ended sacs, called alveoli.