oral cavity 2 - Tongue Flashcards
describe the tongue
muscular organ with special sense of tatse
lies in the oral cavity proper
the anterior and posterior of the tongue is separated by a v shape called?
Sulcus Terminalis
what runs outwards and forwards from midline pit called
Foramen Caecum
Anterior 2/3 of tounge is what type of epithelium
Keratinised epithelium
anterior 2/3 of the tongue contains
papillae
filiform
vallate
folliate
what is the filiform papillae
found over whole anterior 2/3
gives tongue rough appearance
most numerous
what is fungiform papillae
found on the tip
small red dots visible on the tongue
contain taste buds
vallate papillae
largest of the papillae
only 10-12 present
found in front of sulcus Terminalis
contain numerous taste buds
salivary glands present- serous
posterior 1/3 contains what glands
contains mucous secreting glands
posterior 1/3 of tongue is covered by what type of epithelium?
non keratinised epithelium
ventral surface ( under the tongue) contains (5)
lingual frenum - attachment of floor to mouth
fimbriated fold
deep lingual vein
sublingual fold
sublingual papillae
the ventral surface (under the tongue) has what type of epithelium?
non keratinised epithelium
nerve supply to the tongue anterior 2/3
lingual nerve
nerve supply to the posterior 1/3 of tongue
is a sensory nerve
Glossopharyngeal nerve
blood supply for the tongue is
lingual artery - supplies the complete tongue
venous drainage for the tounge is
deep lingual veins
into external jugular veins
lymphatic drainage for the tongue is
submandibular lymph nodes
the surface of the posterior 1/3 of the tongue appears nodular due to the what lying below the epithelium?
lymphoid tissue
the soft tissue fold which lies in the floor of the mouth on either side of the lingual frenum is called what?
the sublingual fold
what is the small soft tissue elevation at the anterior end of the sublingual fold? and what opens on to the surface at this point?
the sublingual papilla
the submandibular duct opens
what are the 4 basic tastes of the tongue?
sweet, salt, bitter , sour
name 3 other factors which influence the various flavours of food stuff
texture
smell
temperature
taste sensation is transmitted from the posterior one-third of the dorsum of the tounge by which nerve?
glossophanangeal (9th cranial nerve)
