Which option lists the three swallowing phases in the standard order?

• A. Oral preparatory phase, Pharyngeal phase, Esophageal phase
• B. Pharyngeal phase, Esophageal phase, Oral preparatory phase
• C. Esophageal phase, Pharyngeal phase, Oral preparatory phase
• D. None of the above

Answer: (A)

Swallowing unfolds in a clear sequence. It starts with the oral preparatory phase, where the food is chewed, mixed with saliva, and formed into a cohesive bolus. Then the pharyngeal phase begins, a reflexive stage in which the swallow is triggered, the airway is protected, and the bolus is propelled through the pharynx toward the esophagus. Finally, the esophageal phase uses peristaltic waves to move the bolus down into the stomach. This order—oral preparatory first, followed by pharyngeal, then esophageal—is why that option is the best choice. Placing the pharyngeal or esophageal phases before the oral preparatory stage would skip or bypass essential steps in getting the bolus ready and directed properly, which doesn't reflect how swallowing actually progresses.