Difference between revisions of "Deglutition"

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<big><center>[[Alimentary - Anatomy & Physiology|'''BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY''']]</center></big>
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<big><center>[[Oral Cavity - Cavity - Anatomy & Physiology|'''BACK TO ORAL CAVITY - ANATOMY AND PHYSIOLOGY]]</center></big>
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<big><center>[[Soft Palate - Anatomy & Physiology|'''BACK TO SOFT PALATE- ANATOMY AND PHYSIOLOGY]]</center></big>
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==Introduction==
 
==Introduction==
  
Deglutition is the process of swallowing. Food is passed from the [[Oropharynx - Anatomy & Physiology|oral pharynx]] into the oesophageal/[[Larynx - Anatomy & Physiology#Laryngeal Pharynx|laryngeal]] [[Pharynx - Anatomy & Physiology|pharynx]] whilst the [[Larynx - Anatomy & Physiology#Epiglottis|epiglottis]] closes across the entrance of the [[Trachea - Anatomy & Physiology|trachea]].
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Deglutition is the process of swallowing. Food is passed from the oral pharynx into the oesophageal/laryngeal pharynx whilst the [[epiglottis]] closes across the entrance of the trachea.
  
It is an involuntary reflex preventing food from passing into the [[Trachea - Anatomy & Physiology|trachea]] and thus preventing choking and respiratory pneumonia.
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It is a voluntary reflex preventing food from passing into the trachea causing choking and eventually respiratory pneumonia.
  
 
==Process==
 
==Process==
  
[[Mastication|Masticated]] and salivated food is cupped by the [[Tongue - Anatomy & Physiology|tongue]] on its dorsal surface and the tip of the [[Tongue - Anatomy & Physiology|tongue]] pushes dorsally against the [[Soft Palate|soft palate]].
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1. Masticated and insalivated food is cupped by the tongue on its dorsal surface and the tip of the tongue pushes dorsally against the soft palate
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2. The jaws are closed. The mylohyoid, hyoglossal and stylohyoid mucles raises the tongue and pushes the bolus into the [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]]. When the food touches the pharyngeal mucosa the swallowing reflex is initiated.
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3. [[Oral Cavity - Oropharynx - Anatomy & Physiology|Oropharynx]] relaxes and soft palate elevated by the levator velli palatini muscle. Pharyngeopalatine arch closes by palatopharyngeus.
  
The jaws are closed. The '''mylohyoid''', '''hyoglossal''' and '''stylohyoid''' mucles raise the [[Tongue - Anatomy & Physiology|tongue]] and push the bolus into the [[Oropharynx - Anatomy & Physiology|oropharynx]]. When the food touches the pharyngeal mucosa, the swallowing reflex is initiated.
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4. Hyoid moved rostro-dorsally by geniohyoid and pterygopharyngeus contracts bringing common pharynx forward to engulf bolus.
  
The [[Oropharynx - Anatomy & Physiology|oropharynx]] relaxes and the [[Soft Palate|soft palate]] is elevated by the '''levator velli palatini''' muscle. The '''pharyngeopalatine arch''' closes by the '''palatopharyngeus''' action.
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5. [[Epiglottis]] bends back to prevent food entering larynx.
  
The [[Hyoid Apparatus - Anatomy & Physiology|hyoid]] is moved rostro-dorsally and the '''pterygopharyngeus''' contracts bringing the common [[Pharynx - Anatomy & Physiology|pharynx]] forward to engulf the bolus. The epiglottis bends back to prevent food entering the [[Larynx - Anatomy & Physiology|larynx]].
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6. Bolus enters oesophageal pharynx and tongue relaxes. Bolus is passed on down oesophagus by a concentric series of contractions by each set of contractor muscle in turn called peristalsis.
  
The bolus enters the [[Larynx - Anatomy & Physiology#Laryngeal Pharynx|laryngeal pharynx]] and the [[Tongue - Anatomy & Physiology|tongue]] relaxes. The bolus is passed on down the [[Oesophagus - Anatomy & Physiology|oesophagus]] by a concentric series of contractions by each set of contractor muscle in turn called peristalsis. The '''pharyngeopalatine arch''' reopens and the [[Hyoid Apparatus - Anatomy & Physiology|hyoid]] moves back by the  geniohyoid. The glottis reopens.
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7. Pharyngeopalatine arch reopens, hyoid moves back by genioohyoid and glottis reopens.
  
 
==Links==
 
==Links==
  
'''Click here for more information on [[Skull and Facial Muscles - Anatomy & Physiology]]'''
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[[Diseases of the conducting airways]]
 
 
{{OpenPages}}
 
[[Category:Feeding Control]]
 
[[Category:A&P Done]]
 

Revision as of 19:25, 30 June 2008

BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY
BACK TO ORAL CAVITY - ANATOMY AND PHYSIOLOGY
BACK TO SOFT PALATE- ANATOMY AND PHYSIOLOGY

Introduction

Deglutition is the process of swallowing. Food is passed from the oral pharynx into the oesophageal/laryngeal pharynx whilst the epiglottis closes across the entrance of the trachea.

It is a voluntary reflex preventing food from passing into the trachea causing choking and eventually respiratory pneumonia.

Process

1. Masticated and insalivated food is cupped by the tongue on its dorsal surface and the tip of the tongue pushes dorsally against the soft palate

2. The jaws are closed. The mylohyoid, hyoglossal and stylohyoid mucles raises the tongue and pushes the bolus into the oropharynx. When the food touches the pharyngeal mucosa the swallowing reflex is initiated.

3. Oropharynx relaxes and soft palate elevated by the levator velli palatini muscle. Pharyngeopalatine arch closes by palatopharyngeus.

4. Hyoid moved rostro-dorsally by geniohyoid and pterygopharyngeus contracts bringing common pharynx forward to engulf bolus.

5. Epiglottis bends back to prevent food entering larynx.

6. Bolus enters oesophageal pharynx and tongue relaxes. Bolus is passed on down oesophagus by a concentric series of contractions by each set of contractor muscle in turn called peristalsis.

7. Pharyngeopalatine arch reopens, hyoid moves back by genioohyoid and glottis reopens.

Links

Diseases of the conducting airways