Difference between revisions of "Mandibular Gland - Anatomy & Physiology"

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|linkpage =Alimentary - Anatomy & Physiology
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|linktext =Alimentary System
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|sublink1=Oral Cavity - Salivary Glands - Anatomy & Physiology#Major Salivary Glands
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|subtext1=MAJOR SALIVARY GLANDS
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==Mandibular Salivary Gland==
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[[Image:Parotid & Mandibular Salivary Gland.jpg|thumb|right|150px|Mandibular Salivary Gland - Copyright Nottingham 2008]]
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*Mixed gland - [[Serous Salivary Gland - Anatomy and Physiology|serous]] and [[Mucous Salivary Gland - Anatomy & Physiology|mucous]] secretion
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*Merocrine secretion
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*Generally smaller than the [[Parotid Gland - Anatomy & Physiology|parotid]] gland
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*It is a moderately large gland in carnivores
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*It is a large gland in herbivores
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*Compact
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*Located around angle of jaw
  
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==Overview==
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*Mandibular duct runs ventral to mucous membrane of floor of [[Oral Cavity Overview - Anatomy & Physiology|oral cavity]], close to frenulum of [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]]
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[[File:Salivary glands.jpg|500px|right|thumb|Dog salivary glands]]
 
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The '''mandibular gland''' produces a '''merocrine''' secretion, which means it is a mixed gland - [[Serous Salivary Gland - Anatomy & Physiology|serous]] and [[Mucous Salivary Gland - Anatomy & Physiology|mucous]] secretions.
 
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It is generally smaller than the '''[[Parotid Gland - Anatomy & Physiology|parotid]]''' gland and is a moderately large gland in carnivores and herbivores. It is compact and located around the angle of the jaw.
 
  
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The '''mandibular duct''' runs ventral to the mucous membrane of the floor of the [[Oral Cavity Overview - Anatomy & Physiology|oral cavity]], close to the '''frenulum''' of the [[Tongue - Anatomy & Physiology|tongue]]. The duct opens at  the '''sublingual caruncle'''.
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*Duct opens at sublingual caruncle
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*Innervated by facial nerve ([[Cranial Nerves - Anatomy & Physiology|CN VII]]) via chordi tympanii of trigeminal ([[Cranial Nerves - Anatomy & Physiology|CN V]])
  
 
==Histology==
 
==Histology==
  
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The mandibular gland is known as a '''tubulo-acinar gland'''. It consists of [[Mucous Salivary Gland - Anatomy & Physiology|mucous]] cells that stain lighter and [[Serous Salivary Gland - Anatomy & Physiology|serous]] demilunes that stain darker. '''Demilunes''' secrete into lumen by canaliculi between mucous cells.
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*Tubulo-acinar gland
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*[[Mucous Salivary Gland - Anatomy & Physiology|Mucous]] cells (stain lighter)
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*[[Serous Salivary Gland - Anatomy and Physiology|Serous]] demilunes (stain darker)
  
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==Innervation==
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*Demilunes secrete into lumen by canaliculi between mucous cells
  
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The mandibular gland is innervated by the '''facial''' nerve ([[Cranial Nerves - Anatomy & Physiology|CN VII]]) via the '''chordi tympanii''' and by  the '''trigeminal''' nerve ([[Cranial Nerves - Anatomy & Physiology|CN V]]).
 
  
 
==Species Differences==
 
==Species Differences==
  
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===Carnivores===
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'''Carnivores'''
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The mandibular gland produces mainly [[Mucous Salivary Gland - Anatomy & Physiology|mucous]] secretions in the dog and cat. It is an oval shape in the canid.
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*Mainly [[Mucous Salivary Gland - Anatomy & Physiology|mucous]] secretion in dog and cat
  
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===Herbivores===
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*Oval shape in canid
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The mandibular gland in herbivores is larger and deeper.
 
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{{Template:Learning
 
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|flashcards = [[Salivary Gland Anatomy & Physiology Flashcards]]
 
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|powerpoints = [[Oral Cavity Histology resource|Oral cavity histology tutorial, which looks at salivary glands]]
 
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|Vetstream = [https://www.vetstream.com/canis/search?s=salivary Salivary Gland Diseases]
 
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}}
 
  
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==Webinars==
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'''Herbivores'''
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<rss max="10" highlight="none">https://www.thewebinarvet.com/gastroenterology-and-nutrition/webinars/feed</rss>
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*Larger and deeper
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[[Category:Salivary Glands - Anatomy & Physiology]]
 
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[[Category:A&P Done]]
 
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[[Category:David_Hogg_reviewing]]
 

Revision as of 00:01, 3 July 2010

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ALIMENTARY SYSTEM
MAJOR SALIVARY GLANDS



Mandibular Salivary Gland

Mandibular Salivary Gland - Copyright Nottingham 2008
  • Merocrine secretion
  • Generally smaller than the parotid gland
  • It is a moderately large gland in carnivores
  • It is a large gland in herbivores
  • Compact
  • Located around angle of jaw
  • Mandibular duct runs ventral to mucous membrane of floor of oral cavity, close to frenulum of tongue
  • Duct opens at sublingual caruncle
  • Innervated by facial nerve (CN VII) via chordi tympanii of trigeminal (CN V)

Histology

  • Tubulo-acinar gland
  • Serous demilunes (stain darker)
  • Demilunes secrete into lumen by canaliculi between mucous cells


Species Differences

Carnivores

  • Mainly mucous secretion in dog and cat
  • Oval shape in canid

Herbivores

  • Larger and deeper
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