The Anatomy Of The Phharynx

Third, the pharynx or another word for the throat the throat is a musculomembranous cavity that is found behind the nasal cavities, mouth, and larynx. It extends from the posterior end of the nasal cavity to the superior end of the esophagus and larynx. It also divides into three sections. Those three sections are the nasopharynx, oropharynx, and laryngopharynx.

The nasopharynx is the superior part of the pharynx that is found in the posterior of the nasal cavity. When you taken in air from the nasal cavity it passes into the nasopharynx and descends through the oropharynx which is found in the posterior of the oral cavity. However, when you inhale from the oral cavity it enters the pharynx at the oropharynx. The inhaled air then descends into the laryngopharynx where it chnages into the opening of the larynx by the epiglottis. The epiglottis is a flap of elastic cartilage that acts as a switch between the trachea and the esophagus switching back and forth when you eat to help you breath.

Forth, trachea or also known as the windpipe is made up of a crescent shape hyaline cartilage rings that lines with pseudostratified ciliated columnar epithelium. The trachea connects to the larynx and the bronchi which allows air to pass through into the thorax. The rings of cartilage make up the trachea which also allows it to remain open to allow air in at all times. The open end of the cartilage rings faces posteriorly toward the esophagus. It allows the esophagus to expand into the space occupied by the trachea in order to allow food to move through the esophagus.

The main function of the trachea is to provide a clear airway for air to enter and exit the lungs. In addition, the epithelium that lines the trachea creates mucus in ...

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...ic responses which can be from pollen, dust, animal dander, or other substances. Some treatments includes the use of drugs that relax the bronchiole smooth muscles and reduce inflammation. Untreated asthma can result into a asthma attack.

Final, lung cancer grows from the epithelium in the respiratory tract. Due to the lymph and blood supply in the lungs the cancer in the lung can readily spread to other parts of the lung or body. This disease is often advance before symptoms become severe enough to notice. Some common symptoms that result in wrong diagnose include coughing, sputum production, and blockage of the airways. The treatment for lung cancer includes removal of part or all of the lung, chemotherapy, and radiation. Lung cancer is the most common cancer and cause of death in males and females in the United States. Most cases in shown to occur in smokers.