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Alimentary System - Horse Anatomy (view source)
Revision as of 21:35, 7 November 2012
, 21:35, 7 November 2012no edit summary
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==Oral Cavity==
==Oral Cavity==
===Teeth===
[[Image:Horse teeth.jpg|thumb|right|150px|Tooth identifation in the horse- copyright Academy of Equine Dentistry-2008]]
====Dental Formula====
The formula for '''deciduous''' teeth: 2 (I3/3 C0/0 P3/3)
The formula for '''permanent''' teeth: 2 (I3/3 C1/1 P3-4/3 M3/3)
====Canines====
The canines are '''rudimentary''' and in '''diastema'''. The size of the [[Enamel Organ#Root|root]] is proportionally larger than the [[Enamel Organ#Crown|crown]].
====Molars====
[[Image:Horse Tooth.jpg|thumb|right|150px|Horse tooth - Copyright Malcom Morley]]
The molars have enlarged surfaces and higher [[Enamel Organ#Crown|crowns]]. They have delayed [[Enamel Organ#Root|root]] development and complicated folding of [[Enamel Organ#Enamel|enamel]].
====Incisors====
Incisors have high [[Enamel Organ#Crown|crowns]] and folded [[Enamel Organ#Enamel|enamel]] surfaces. Their [[Enamel Organ#Root|roots]] converge.
====Premolars====
A horse's '''Wolf tooth''' (PM1) is often lacking. Molars and Premolars form a continuous surface. Premolars have a high rate of wear and continually erupt. The upper teeth are wider than the lower. There is no infundibulum in the lower teeth.
====Ageing====
Horses can be aged by their teeth. At 2 and a half the first permanent incisor will erupt; At 3 and a half the second permanent incisor will erupt and at 4 and a half the third permanent incisor will erupt. Over 5 years of age the folding of the enamel ring ('''infundibulum''') can indicate age. There is a 7 year hook and over 13 years of age a '''dental star''' will be present.
The '''Galvayne's Groove''' is a brown groove on the upper corner incisor teeth and indicates that the horse is over 10 years old. At 15 the groove will be approximately half way down the tooth; At 20 the groove will run down the whole tooth; Over 20 the grove begins to disappear; At 25 the groove will only be visible on the bottom half of the tooth. At 30 the groove will usually be gone.
===Palate===
==Oesophagus==
==Oesophagus==
==Stomach==
==Stomach==