what does an esophageal flap do
The uvula, a small flap attached to the soft palate, helps prevent fluids from passing upward into the nasal cavity. The Digestive System The esophagus is a thin-walled, muscular channel lined with mucous membranes that connects the throat with the stomach. Food and fluids are propelled through the esophagus not only by gravity but also by waves of rhythmic muscular contractions called peristalsis.