3 stages of swallowing food


as simple as possible, as it may seem, swallowing is actually one of the most difficult actions performed by our bodies.This seemingly simple and automatic action includes a series of shares , which must occur in a sharp three-part sequence, including several parts of the nervous system.

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There are volunteers or deliberate, Actions are ingested, as well as involuntary or reflective acts associated with swallowing.

Three deglution phases are described below:

Oral phase

Swallows start with the oral phase. This phase begins when the food is placed in the mouth and moistens with saliva.The food is called bolus food.

The food bolus is voluntarily chewed with teeth that are controlled by the stomach muscles (chew).The time of this phase of food is prepared for smaller sizes, which is well lubricated in such a way that it can be easily transmitted from the front towards the back of the mouth.The food bolus voluntarily moves to the Oroglogness (upper throat).

of oropharynx, the food bolus is additionally sent to the back of the tongue and other muscles at the bottom of the throat (throat).This step also requires a voluntary elevation of a soft sky to prevent food from entering the nose.

The muscles that control the oral swallow phase are stimulated by the nerves located in the accessories of the brain, called cranial nerves.The cranial nerves involved in the coordination of this stage include the rigotive nerve, the facial nerve and the hypoglyte nerve.

Phase phase


Since Bolus food arrives at the pharynx, special sensory nerves activate the involuntary phase of swallowing.The reflection swallow, which is mediated by the center of swallowing in the middle (lower part of the brain),It leads to the fact that the food will be returned to the pharynx and the esophagus (food pipe) on rhythmic and involuntary cuts of various muscles on the back of the mouth, pharynx and esophagus .

because the mouth and throat serve as an advent of food and air, the mouth provides a route so that the air will put on the trachea and in the lungs, and it also provides a route so that The food is entered into the esophagus and stomach.

The critical part of the phase of the phase is an involuntary closure of the larynx using epigottes and vocal ligaments, and braking of temporary breathing. These actions prevent food from entering the wrong tubing in Trachea (Winpipe).

The closure of the larynx with epiglotta protects the lungs from the lesion, since the food and other particles included in the lungs can cause severe infections and irritation of the pulmonary tissue.Easy infections caused by problems with the phase phase of the swallowing phase Reflection are generally known as aspiration pneumonia .

Esophagus phase

How FARENX sheets of food sheets are included in the esophagus, a muscular structure of the can,That leads to food in the stomach due to its powerful coordinated muscle contractions.The passage of food through the esophagus during this phase requires a coordinated action of Nagus Nagus Nagus , the Glossoparingeal nerve and the nervous fibers of the sympathetic nervous system.

The esophagus has two important muscles that open and reflexively, since the food bolus descends during swallowing.These muscles are called sphinders, allow the food bolus to pass in the front direction, which prevents it in the wrong direction (regurgitation).

Both the esophagus of the spheter, the first upper part, and then opens in response to the pressure of the food bolus and close after the passage of the food bolus.

The upper esophageal sphincter prevents the regurgitation of food or saliva back into the mouth, while the lower esophageal sphincter ensures that the food remains in the abdomen, preventing regurgitation in the esophagus.At the same time, esophageal sphincters serve as a physical barrier for Regurgus.


In general, healthy people can swallow with very small intentional thoughts and efforts.If the nervous system breaks due to a stroke or other disease, there may be problems with swallowing. The difficulties of swallow are called dysphagia. Dysphagia can lead such problems as a suffocation, lack of appetite and weight loss, as well as aspiration pneumonia.

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If you Track tested or other neurological disease, can take a swallow evaluation to determine if it has dysphagia.If you have signs of dysphagia, you must have a speech and lost therapy so that your swog muscles can improve as much as possible.

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