Which statement best describes the phases of swallowing?

• A. Phases of swallowing occur only in the esophagus.
• B. Oral phase in the mouth (voluntary), pharyngeal phase in the pharynx (involuntary with airway protection), and esophageal phase in the esophagus (involuntary peristalsis to the stomach)
• C. Esophageal phase in the stomach (voluntary), oral phase in the mouth (involuntary), pharyngeal phase in the pharynx (involuntary)
• D. Oral phase in the mouth (voluntary), pharyngeal phase in the esophagus (involuntary), esophageal phase in the stomach (involuntary peristalsis)

Answer: (B)

Swallowing unfolds in three coordinated stages. The oral phase is voluntary and takes place in the mouth as the tongue forms and propels a bolus toward the oropharynx. The pharyngeal phase is automatic and occurs in the pharynx; it includes airway protection mechanisms—laryngeal closure and the epiglottis tilting to shield the airway while the bolus moves toward the esophagus. The esophageal phase is also automatic, with peristaltic waves pushing the bolus down the esophagus into the stomach, aided by relaxation of the upper and lower esophageal sphincters to allow passage and then prevent reflux.

This description matches the statement that places the oral phase in the mouth as voluntary, the pharyngeal phase in the pharynx with airway protection, and the esophageal phase in the esophagus with involuntary peristalsis to the stomach. Descriptions that misplace a phase in the stomach or assign the esophageal phase as voluntary conflict with how swallowing is organized and controlled.