The three phases of deglutition (swallowing) in order from beginning to end are the oral phase, the pharyngeal phase, and the esophageal phase.

1. Oral Phase: This is the first phase where the food is prepared for swallowing. The food is chewed and mixed with saliva to form a bolus. The tongue then pushes the bolus towards the back of the mouth to initiate swallowing.

2. Pharyngeal Phase: This is the second phase where the bolus is propelled from the back of the oral cavity into the esophagus. The larynx elevates to prevent food from entering the trachea (windpipe) and the upper esophageal sphincter relaxes to allow food to enter the esophagus.

3. Esophageal Phase: This is the final phase where the bolus is transported through the esophagus into the stomach. This is facilitated by a series of coordinated muscle contractions known as peristalsis. The lower esophageal sphincter then relaxes to allow the bolus to enter the stomach and contracts again to prevent stomach acids from entering the esophagus.

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The three phases of deglutition (swallowing) in order from beginning to end are the oral phase, the pharyngeal phase, and the esophageal phase.

1. Oral Phase: This is the first phase where the food is prepared for swallowing. The food is chewed and mixed with saliva to form a bolus. The tongue then pushes the bolus towards the back of the mouth to initiate swallowing.

2. Pharyngeal Phase: This is the second phase where the bolus is propelled from the back of the oral cavity into the esophagus. The larynx elevates to prevent food from entering the trachea (windpipe) and the upper esophageal sphincter relaxes to allow food to enter the esophagus.

3. Esophageal Phase: This is the final phase where the bolus is transported through the esophagus into the stomach. This is facilitated by a series of coordinated muscle contractions known as peristalsis. The lower esophageal sphincter then relaxes to allow the bolus to enter the stomach and contracts again to prevent stomach acids from entering the esophagus.

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The three phases of deglutition (swallowing) in order from beginning to end are the oral phase, the pharyngeal phase, and the esophageal phase.

1. Oral Phase: This is the first phase where the food is prepared for swallowing. The food is chewed and mixed with saliva to form a bolus. The tongue then pushes the bolus towards the back of the mouth to initiate swallowing.

2. Pharyngeal Phase: This is the second phase where the bolus is propelled from the back of the oral cavity into the esophagus. The larynx elevates to prevent food from entering the trachea (windpipe) and the upper esophageal sphincter relaxes to allow food to enter the esophagus.

3. Esophageal Phase: This is the final phase where the bolus is transported through the esophagus into the stomach. This is facilitated by a series of coordinated muscle contractions known as peristalsis. The lower esophageal sphincter then relaxes to allow the bolus to enter the stomach and contracts again to prevent stomach acids from entering the esophagus.

The three phases of deglutition in order from beginning to end are the , , and the esophageal.

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