Key Points Development of the lung as a derivative of the upper gastrointestinal tract. Predisposition of anatomy of the lungs to aspiration of food, saliva, and vomitus. Development of four-chambered ...

Air enters the GI tract via the tracheoesophageal fistula and the newborn presents clinically with a gas-filled abdomen and frequent aspiration pneumonias due to gastric reflux into the respiratory ...