Mouth Lecture Flashcards
Boundaries of the vestibule of the mouth
Rostral: lips
Lateral: cheeks
Internal: teeth/gums
Boundaries of the oral cavity proper
Rostral: Teeth
Ventral”Tongue
Dorsal: palate
Mucosa lining surface of oral cavity
Stratified squamous epithelium
Submucosa made of nouth
DICT. Type I collagen w/elastic fibers
Salivary glands in mouth
Mucuous
Serous
Seromucous
Muscle fxn of tongue
Intrinsic muscles: change shape of tongue
Extrinsic: Move tongue
Rostral 2/3 of tongue
Apex and body
Caudal 1/3 of tongue
Root
5 main types of papillae of tongue
Conical Filiform Fungiform Foliate Vallate
Accessory papillae of tongue
Lentricular (ruminants)
Marginal (temporary)
Papillae w/o taste buds
Conical
Filiform
Lentricular
Marginal
Papillae w/taste buds
Foliate
Fungiform
Vallate
Conical papillar
- Where
- Describe
Caudal 1/3 of tongue
Lacks taste buds
Large, pointed apex,
Keratinized
CT core
What papillae is absent in horses
Conical papillae
Filiform papillae
- where
- describe
Rostral 2/3 of tongue
Highly keratinized in cat/cow “sandpaper”
CT core
Sharply pointed apex
Horse filiform papillae
Lacks CT core and only str sq epithelium
Foliate papillae
- Where
- Describe
Dorsolateral surface of caudal pt of tongue
Leaf-like projections
Submucosal serous glands open into crypts
Taste buds may degenerate in infancy
Foliate papillae in cows and cats
Cows lack
Cats have but w/o taste bud
Fungiform papillae
- where
- describe
rostral 2/3
Taste buds
Mushroom shape with THIN stalk
Vallate papillae
- where
- describe
jxn btw rostral 2/3 and caudal 1/3 on lateral wall
Taste buds
Large/round stalk thats thck
Submucosal serous glands open into base of sulcus
Marginal papillae
- Where
- Fxn
On lateral margins of neonatal carnviores/pigs to help nursing. Regress over time
Lentricular papillae
- Where
- Describe
In ruminants/humans
Lens-shaped on torus linguae
Types of cells in taste buds
Dark cells (I) Light cells (II) Intermediate cells (III) Basal cells/stem cells (IV)
What cells help in taste discernment
1-3
Innervated by CN 7, 9, 10
microvilli project into taste pore
