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Main Parts and Functions of the Upper Respiratory System

17 Apr

The upper respiratory tract or system consists of the following organs; the nose, pharynx, larynx, and trachea.

1. Nose and Pharynx  The nose contains the paired nasal cavities through which the air passes on its way to and from the pharynx. The pharynx is the upper part of the throat. It connects the nose and the mouth to the larynx or voice-box. The air is warmed in the nasal cavities.

The nasal cavities are lined by the hairy mucous membrane which traps paricles and other foreign bodies in the inhaled air. The trapped particles are wafted to the pharnx where they can be removed or eliminated by blowing the nose and by coughing and spitting out.

2. Larynx and Trachea   After going through the pharynx, the air goes to the voice box or larynx which is the narrowest part of the respiratory system. Then the air goes to the wind pipe or trachea. The trachea is a tube composed of incomplete cartilage rings. It is located in the middle of the neck, going to the chest. At the entrance of the chest, the trachea brances into two chief bronchial tubes or bronchi.

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Posted by on April 17, 2012 in Uncategorized

 

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