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Tongue - Anatomy & Physiology (view source)
Revision as of 17:02, 10 December 2010
, 17:02, 10 December 2010→Histology
*A secondary blood supply to the tongue is provided via the tonsillar branch of the facial artery and the ascending pharyngeal artery
*A secondary blood supply to the tongue is provided via the tonsillar branch of the facial artery and the ascending pharyngeal artery
==[[Tongue - Histology|Histology]]==
==Histology==
[[Image:Tongue Histology Cat.jpg|thumb|right|150px|Tongue Histology (Cat) - Copyright RVC 2008]]
*Stratified squamous epithelium
*[[Lingual Gland - Anatomy & Physiology|Lingual]] glands
*Mucosal covering tightly adheres to the contact surface
*Degree of keratinisation depends on diet
*Less keratinisation on ventral surface and sides of tongue
*Covered by papillae (taste buds)for protection and taste
*Papillae are specialised projections of the mucosa
*Some papillae have taste buds others are mechanical to roughen surface of tongue
==Types of Papillae==
===Conical===
*Not in horses
*Caudal 1/3 of tongue
*Point caudally
*No taste buds
*Thick epithelium
[[Image:Foliate_Papillae_Cat.jpg|thumb|right|150px|Foliate Papillae (Cat) - Copyright RVC 2008]]
===Foliate===
*8 to 12 papillae in parallel folds, one either side of tongue midline
*Stratified squamous epithelium
*Caudal 1/3 of tongue
*Taste buds present
*Glands
*Lymphatics present
===Vallate===
[[Image:Circumvallate Papillae.jpg|thumb|right|150px|Circumvallate Papillae (Goat) - Copyright RVC 2008]]
*3 to 6
*Often secondary papillae in taste buds
*Broad glands
*Caudal 1/3 of tongue
*Taste buds present
*Lymphatic tissue present
===Fungiform===
*Red dots on tongue surface
*Keratinised, stratified squamous epithelium
*Blood vessels
*Loss of heat via panting in dogs
*Rostral 2/3 of tongue
*Taste buds present
[[Image:Filoform Papillae Histology.jpg|thumb|right|150px|Filoform Papillae Histology (Cat) - Copyright RVC 2008]]
===Filiform===
*Most numerous
*Points caudally
*No taste buds
*No glands
*No lymphatics
*Smallest
*Thick keratin on stratified squamous epithelium
*Very prominent in cat
*Rostral 2/3 of tongue
==[[Tongue - Histology#Types of Papillae|Types of Papillae]]==
==[[Tongue - Histology#Types of Papillae|Types of Papillae]]==