Oral cavity, Tongue, Salivary glands and Palate

Question 1

Vestibule

Answer 1

space between the cheek and the gum in the mouth; cavity lying outside the teeth and guns and inside the lips and cheeks; ducts of the parotid and zygomatic salivary gland open into the dorsocaudal part of the vestibule

Question 2

Opening of the parotid duct

Answer 2

through the cheek on a small papilla located opposite the caudal end of the superior fourth premolar or shearing tooth

Question 3

Oral cavity

Answer 3

lies within the arcade of teeth in the mouth
bounded dorsally by the hard palate and a small part of the adjacent soft palate; laterally and rostrally by the by the dental arches; ventrally by the tongue and adjacent mucosa; caudal boundary ventrally is the body of the tongue at the palatoglossal arch

Question 4

Palatoglossal arch

Answer 4

ridge of tissue from the body of the tongue to the soft palate

Question 5

Tongue divisions

Answer 5

Root: caudal third (caudal to palatoglossal arch)
Body: long, slender, rostral part of the tongue (palatoglossal arch to lingual frenulum)
Apex: free extremity of the tongue

Question 6

Types of papillae on the tongue (taste buds)

Answer 6

Filiform- in the spaces between the fungiform papillae (body/apex)
Fungiform- mushroom tops (body/apex)
Vallate- at the back of tongue, large and round (junction of body and root)
Foliate- most lateral, near palatoglossal arch (root)
Conical- surround the vallate papillae (root)

Question 7

Lingual frenulum

Answer 7

tongue attachment to the rostral aspect of the floor of the oral cavity; fold of mucosa

Question 8

Lyssa

Answer 8

fusiform fibrous spicule extends from the apex to the level of attachment of the frenulum

Question 9

Sublingual caruncle

Answer 9

slightly raised elevation of mucosa that is lateral to the rostral part of the frenulum and protrudes from the floor of the oral cavity

Question 10

Sublingual fold

Answer 10

extension caudally of the sublingual caruncle

Question 11

Mandibular salivary duct/gland

Answer 11

duct: found in the sublingual fold; course rostrally to open on or beside the sublingual caruncle, separately or through a common opening
gland: lateral side of the head just caudal to the angle of the mandible, where it lies between the maxillary and linguofacial veins; covered by a thick capsule that also includes the caudal part of the monostomatic sublingual gland

Question 12

Major sublingual salivary duct/gland

Answer 12

duct: found in the sublingual fold; course rostrally to open on or beside the sublingual caruncle, separately or through a common opening
gland: roughly triangular, sits on the rostral end of the mandibular salivary gland

Question 13

Parotid salivary duct/gland

Answer 13

duct: formed by two or three converging radicles, unite and leave the rostral border of the gland; grooves the lateral surface of the masseter muscle as it passes to the cheek; opens into the vestible on a small papilla at the level of the caudal margin of the superior fourth premolar
gland: lies between the mandibular gland and the ear; closely applied to the base of the auricular cartilage of the ear

Question 14

Incisive papilla

Answer 14

located just caudal to the central incisor teeth; fissue on either side of this papilla is the oral opening into the incisive duct

Question 15

Incisive duct

Answer 15

fissue on either side of the incisive papilla is the oral opening of the duct; passes through the palatine fissues and opens into the ventral nasal meatus; extending caudally from the incisive duct, close to its entrance into the nasal cavity, is the vomeronasal organ

Question 16

Vomeronasal organ

Answer 16

tubular structure about 2 cm long lies at the base of the nasal septum dorsal to the hard palate and is an olfactory receptor of sexual stimuli