THE PHARYNX - THE PHARYNX-the throat; a funnel-shaped tube...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
THE PHARYNX -the throat; a funnel-shaped tube that connects the nasal cavity and mouth superiorly to the larynx and esophagus inferiorly. A. The Pharynx is divided into three major regions : 1. The Nasopharynx -posterior to the nasal cavity, this serves only as an air passageway. a. During swallowing, the uvula moves to close off the nasopharynx; thus preventing food from moving into the nasal cavity. b. Pharyngeal tonsil (Adenoid )-located on the posterior wall of the nasopharynx. These trap and destroy pathogens entering the nasopharynx via air. If these become enlarged, they can block the flow of air through the nose and into the throat. As a result, the air is not properly warmed before it enters the lungs. The person may breathe with their mouth open. c. 4 Openings into the Nasopharynx 1) 2 Internal Nares 2) 2 Auditory (Eustachian) Tubes -these drain the middle ear cavity to equalize pressure in the ear with atmospheric pressure. 2. The Oropharynx -posterior to the oral cavity, opens into the mouth through the fauces . Both swallowed food and inhaled air pass through here. a. This portion of the pharynx is covered by a layer of protective stratified
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/15/2011 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

Page1 / 2

THE PHARYNX - THE PHARYNX-the throat; a funnel-shaped tube...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online