Oral Cavity Structures Flashcards
What is the cleft of the upper lip called, separating the upper lips?
Philtrum
Describe the musculature of the lips
Striated and voluntary
The muscle surrounding the mouth is the:________________
Orbicularis oris
The oral cavity represents what part of the cranium?
Viscerocranium (ventral part of the face)
Why are age related changes necessary in the oral cavity?
To house secondary dentition
What is the bone support of the dorsal and ventral wall of the oral cavity?
Upper jaw + palate
Mandible
The _____________m supports the floor of the oral cavity/
Mylohyoideus
What does the buccinator m do?
Lateral support of the oral cavity (cheeks)
List the 2 parts of the oral cavity
- Vestibulum (labial and buccal part)
- Cajun oris proprium
What almost completely fills the oral cavity when the mouth is closed?
Tongue
What makes up the caudal border of the oral cavity?
Palatoglossal arch
What separates the primary oral cavity (subcephalic pocket) from the primitive pharynx of the foregut?
Oropharyngeal membrane
List the 4 parts of the tongue
- Root
- Body
-Apex - Free Margin
What attaches the tongue to the floor?
Frenulum linguae
What attaches the tongue to the base of the skull?
Hyoid apparatus
What type of muscle tissue in the intrinsic muscle of the tongue?
Striated voluntary
What explains the rough surface of the cat’s tongue?
Keratinization and cornification of conical papillae
Describe the function of the mechanical papillae
Aid in food transport while chewing and swallowing
What are the 3 types of mechanical papillae based on shape or location?
- Filiform
- Conical
- Marginal
Which type of mechanical papillae of the tongue is only present in suckling puppies?
Marginal
Describe location of the papillae of the tongue
Only present in dorsal side and edge
What is the ventral part of the tongue lined with?
Tunica mucosa
The tunica mucosa of the tongue has what type of papillae?
Gustatory papillae
List the 3 types of gustatory papillae
- Fungiform
- Circumvallate
- Foliate
True/false: Sensory cells in the gustatory papillae are post mitotic
True
What do gustatory papillae contain ?
Taste Buds
What are the 4 CN innervating the tongue in development?
CN V3 (lingual branch) , VII, IX, XII
What is the suspensory apparatus of the tongue?
Hyoid apparatus
Wat is the derivative of the hyoid apparatus?
Branchial apparatus
What are the precursors of the hyoid cartilages/bones?
Cartilages of the branchial arches
How is the basihyoid bone oriented?
Transversely
Is the basihyoid bone paired?
No
Define the function of the hyoid apparatus
- support the tongue and larynx
- enables deglutition
What limits the size of the food bolus?
Hyoid apparatus
What can explain dry mouth under stress but a watery mouth when you look at food?
Autonomous innervation
Are salivary glands exocrine or endocrine?
Exocrine
What helps push saliva out from the glands?
Myepithelial cells
What explains the topography, morphology, and innervation of the tongue?
Developmental processes
Describe a palatine cleft
Failure of the formation or fusion of the palatine processes of L/R Maxilla
What’s the local swelling that may be due to sediment in excretory salivary glands?
Ranula
