HUBS1107 Lecture Notes - Lecture 3: Pharyngeal Muscles, Eustachian Tube, Gastrointestinal Tract
26 Oct 2018
School
Department
Course
Professor
Identify the following regions: nasopharynx, oropharynx and laryngopharynx
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Identify the opening of the Eustachian (auditory or pharyngotympanic tube) and consider
the connection it has to the soft palate
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Identify the vallecular and piriform recesses (2 of each) and describe why these two
recess areas are important
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Identify the posterior constrictor muscles (superior, middle and inferior) and describe the
general function and location of these muscles
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Describe the innervation of the pharynx
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Describe what is occurring within the pharynx during normal swallowing
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Objectives:
Funnel-shaped part of the gut tube called "the pharynx" extends from base of skull to
cricoid cartilage (base of larynx)
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Pharynx has relations to ability to aspire as well as eating
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Involved in passage of food to esophagus and air to trachea and lungs
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Nasopharynx contains pharyngeal tonsils (adenoids) and opening of auditory
(Eustachian) tube
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Oropharynx contains palatine tonsils in tonsillar fossae
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Recesses are pouched areas that normally when we swallow, will flatten off
and won't cause problems. If we don’t swallow properly, it will cause
problems.
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Laryngopharynx contains the piriform recesses on each side of larynx and, more
superiorly, located anterior to the epiglottis and just posterior to the tongue the
vallecular recesses
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Three parts: naso-, oro- and laryngopharynx
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Three pharyngeal constrictors form swallowing part of gut tube (superior, middle and
inferior)
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Ability to get food down posteriorly and getting air in and out anteriorly
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Does 2 things is a very confined space
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Upper part of respiratory system specialized as larynx
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Easiest to think of larynx as sphincter that evolved into speech organ
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Lungs formed as buds off the gastrointestinal tract
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The pharynx
Conceptual view of the location of the three regions of the pharynx and relevance
When we breathe in (through mouth and nose), air comes in through nasal and oral
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cavity (nasopharynx and oropharynx) and into the laryngopharynx
When intake of food through mouth, nasopharynx is sealed and pharyngeal area is
broaden to allow the food bolus to go through
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Need very coordinated ability to allow swallowing (especially around the laryngeal area)
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Divisions of the pharynx
The area where the
Eustachian tube will be seen
The Pharynx
Saturday, 2 September 2017
3:54 PM
HUBS1107 Page 6.1
Document Summary
Identify the following regions: nasopharynx, oropharynx and laryngopharynx. Identify the opening of the eustachian (auditory or pharyngotympanic tube) and consider the connection it has to the soft palate. Identify the vallecular and piriform recesses (2 of each) and describe why these two recess areas are important. Identify the posterior constrictor muscles (superior, middle and inferior) and describe the general function and location of these muscles. Describe what is occurring within the pharynx during normal swallowing. Funnel-shaped part of the gut tube called "the pharynx" extends from base of skull to cricoid cartilage (base of larynx) Involved in passage of food to esophagus and air to trachea and lungs. Pharynx has relations to ability to aspire as well as eating. Nasopharynx contains pharyngeal tonsils (adenoids) and opening of auditory (eustachian) tube. Laryngopharynx contains the piriform recesses on each side of larynx and, more superiorly, located anterior to the epiglottis and just posterior to the tongue the vallecular recesses.
