Pharynx and Larynx

Pharynx and Larynx - Pharynx and Larynx The pharynx is the...

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Pharynx and Larynx The pharynx is the throat. It consists of three parts: the nasopharynx from the nasal cavity, the oropharynx from the oral cavity, and the laryngopharynx which is the common pathway for both the digestive and respiratory systems (see Figure 2 ). The laryngopharynx leads into the esophagus and the trachea branches anteriorly. The nasopharynx is particularly important for the respiratory system as it makes a nearly 90 degree turn; small particles that avoided the nasal mucosa stick to the posterior wall of the nasopharynx and are swallowed instead of entering the lungs. Figure 2 The larynx is the entry way to the respiratory system. The very superior opening of the larynx is covered by the epiglottis . During swallowing the epiglottis covers the opening to the larynx, preventing ingested substances from entering the respiratory passageways. The vocal cords are also found in the larynx. These structures vibrate during exhalation and can be adjusted to generate sound. These sounds can be manipulated by the throat, nasal cavity, cheeks, lips and
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This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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Pharynx and Larynx - Pharynx and Larynx The pharynx is the...

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