What structure prevents food from entering the trachema? The tracheal mucosa, Epiglottis, and lower esophageal sphincter are all involved. Each of them plays a role in closing the respiratory tract. Here are some details about each one. If you are unable to identify a structure, here is a summary:


The epiglottis is a flexible flap of cartilage that lies at the base of the tongue. It is responsible for preventing food and liquids from entering the trachea during swallowing. When you swallow, you will find the epiglottis folded back, blocking the opening. This prevents food and liquids from entering the esophagus or windpipe. The epiglottis is made of elastic cartilage and covered with mucous membrane. It projects forward and backward behind the hyoid bone, while closing during swallowing.

When the epiglottis does not close properly, it will cause a coughing fit. Aspiration, the condition in which food or liquid travels into the lungs, is a dangerous condition called aspiration. A person suffering from aspiration should seek medical attention as soon as possible. A coughing fit can lead to pneumonia. The epiglottis is a flap of tissue covering the trachea.

Tracheal mucosa

The mucosa lines the lumen of the trachea and contains goblet cells and ciliated pseudostratified columnar epithelium. These cells produce mucus that coats the inner lining of the trachea and traps debris in the inhaled air. The mucus is also pushed away from the lungs by long hair-like cilia. Mucus then makes its way to the larynx, where it is expelled during coughing.

When swallowing, food cannot enter the trachea because of the epiglottis. This ridge closes and acts as a trap door that prevents food from entering the trachea. The larynx is divided into two primary bronchi and an upper and lower airway called the esophagus. The trachea is supported by two cartilage rings on either side.

Lower esophageal sphincter

The lower esophageal sphinctor is a muscular valve that surrounds the esophagus as it enters the stomach. It opens to allow food to pass into the stomach but contracts to prevent food and stomach acids from backing up into the esophagus. When you swallow, the lower esophageal sphincter closes tightly to prevent the contents of your stomach from re-entering your esophagus. The result is a burning or choking sensation that is caused by the reflux of food and acid into the esophagus.

The lower esophageal sphincetes are a complex system of muscles that act to prevent excessive reflux of gastric contents from passing into the lungs. These muscles include the crural diaphragm, gastric muscle fibers, and esophageal smooth muscle. The esophageal sphincter also acts as a valve that prevents food from passing into the trachea and causing problems.

Esophageal dilation

Achalasia is a condition in which food and liquids cannot move from the stomach to the lungs. It is caused by a faulty function of the lower esophageal sphincter, a muscular ring that relaxes and allows food to move into the stomach. In people with achalasia, the sphincter does not relax, and the natural movement of the esophagus called peristalsis is impaired. If you are suffering from achalasia, your doctor may recommend that you take antibiotics before undergoing any dental procedures.

Acute complications of esophageal dilation may include bleeding and a perforation. This complication is rare, and occurs in approximately one to four out of every 1,000 dilations. If a perforation occurs, surgery will be necessary to repair the tear, and the patient must fast for six hours before the procedure. It is important to follow all pre-procedure instructions and follow any instructions given to you by your doctor.