NREMT Advanced EMT

Answer - D - All of the structures above are part of the digestive system except the trachea, which is the tube that allows air flow from the nose and mouth to reach the lungs. The trachea is lined with cartilage, which keeps it open for air flow rather than collapsing. The esophagus is the tube that allows food to travel from the mouth to the stomach (then on to the small intestine and large intestine).