Difference between revisions of "Cheeks"

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<big><center>[[Alimentary - Anatomy & Physiology|'''BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY''']]</center></big>
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==Overview==
 
  
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The cheeks (buccae) are important in the process of [[Mastication|mastication]] (and also drinking in herbivores). Minor [[Salivary Glands - Anatomy & Physiology|Salivary glands]] are located within the buccal musculature. The cheeks also create extensive food storage pouches in some species.
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==Introduction==
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The cheeks (buccae) are important in the process of [[Mastication|mastication]] (and also drinking in herbivores). [[Oral Cavity - Salivary Glands - Anatomy & Physiology|Salivary glands]] are located within the buccal musculature.  
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The cheeks also create extensive food storage pouches in some species.
  
 
==Structure and Function==
 
==Structure and Function==
  
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The cheeks are composed of many of the muscles of [[mastication]].
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*The cheeks are composed of muscles for [[mastication]]:
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**The buccinator muscle
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**The masseter muscle
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**Lateral and medial pterygoids
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**Digastricus muscle
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**Zygomaticus muscle
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**Temporalis muscle
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**Platysma muscle
  
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The main muscles of [[mastication]] are:
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*[[Parotid|Parotid duct]] ends in a small papillae opposite the upper fourth premolar (canid)
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*The '''masseter''' muscle
 
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*The '''lateral''' and '''medial''' pterygoids
 
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*The '''digastricus''' muscle
 
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*The '''temporalis''' muscle
 
  
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Other muscles that aid mastication include :
 
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*the buccinator muscle
 
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*the zygomaticus muscle
 
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*the platysma muscle
 
  
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==Histology==
  
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The '''[[Parotid Gland - Anatomy & Physiology|Parotid duct]]''' opens in a small papillae above the upper fourth premolar (canid).
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*Non keratinised stratified epithelium
  
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==Innervation==
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*Some keratinisation in ruminants (see species difference section)
  
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The cheeks are innervated by the trigeminal nerve ([[Cranial Nerves - Anatomy & Physiology|CN V]]) and the facial nerve ([[Cranial Nerves - Anatomy & Physiology|CN VII]]).
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*[[Buccal|Buccal]] glands
  
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==Histology==
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*[[Zygomatic|Zygomatic]] salivary gland
  
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*Non keratinised stratified epithelium
 
  
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*Some keratinisation in ruminants (see [[Cheeks#Species Differences|species difference section]] )
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==Innervation==
  
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*[[Buccal Gland - Anatomy & Physiology|Buccal]] glands
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*Trigeminal nerve ([[Nervous System - CNS - Anatomy & Physiology#Innervation - Cranial Nerves|CN V]]) 
  
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*[[Zygomatic Gland - Anatomy & Physiology|Zygomatic]] salivary gland
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*Facial nerve ([[Nervous System - CNS - Anatomy & Physiology#Innervation - Cranial Nerves|CN VII]])
  
 
==Species Differences==
 
==Species Differences==
  
 
===Rodents===
 
===Rodents===
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'Cheek pouches' are '''diverticula''' found in rodents (and monkeys) allowing food storage. The pouches can be extensive extending into the thorax with their own musculature.
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*'Cheek pouches' are diverticula found in rodents (and monkeys) allowing food storage. The pouches can be extensive extending into the thorax with their own musculature.
  
 
===Ruminants===
 
===Ruminants===
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'''Papillae''' are present on the medial surface of the cheeks. These large, pointed and densely spaced projections of '''keratin''' provide protection to the underlying epithelium due to the rough diet.
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*Papillae are present on the medial surface of the cheeks. These large, pointed and densely spaced projections of keratin provide protection to the underlying epithelium due to the rough diet.
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{{Learning
 
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|flashcards = [[Cheeks Anatomy & Physiology Flashcards]]<br>[[Facial_Muscles_-_Musculoskeletal_-_Flashcards|Facial Muscles Flashcards]]
 
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|Vetstream = [https://www.vetstream.com/canis/Content/Disease/dis02133.asp Masticatory Myopthies]
 
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}}
 
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{{review}}
 
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{{OpenPages}}
 
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[[Category:Oral Cavity - Anatomy & Physiology]]
 
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[[Category:Musculoskeletal System - Anatomy & Physiology]]
 

Revision as of 09:09, 22 July 2008

BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY


Introduction

The cheeks (buccae) are important in the process of mastication (and also drinking in herbivores). Salivary glands are located within the buccal musculature.

The cheeks also create extensive food storage pouches in some species.

Structure and Function

  • The cheeks are composed of muscles for mastication:
    • The buccinator muscle
    • The masseter muscle
    • Lateral and medial pterygoids
    • Digastricus muscle
    • Zygomaticus muscle
    • Temporalis muscle
    • Platysma muscle
  • Parotid duct ends in a small papillae opposite the upper fourth premolar (canid)


Histology

  • Non keratinised stratified epithelium
  • Some keratinisation in ruminants (see species difference section)


Innervation

  • Trigeminal nerve (CN V)

Species Differences

Rodents

  • 'Cheek pouches' are diverticula found in rodents (and monkeys) allowing food storage. The pouches can be extensive extending into the thorax with their own musculature.

Ruminants

  • Papillae are present on the medial surface of the cheeks. These large, pointed and densely spaced projections of keratin provide protection to the underlying epithelium due to the rough diet.
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