Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
44 Cards in this Set
- Front
- Back
|
|
|
lips muscle layers
|
1. mucosa- moist lining layer made up of epithilial surface overlaying connective tissue layer known as lamina propria
2. muscle, tendon salivary glands with ducts opening through oral mucosa 3. skin |
|
orbicularis oris
|
encircles opening of oral cavity within lip and acts to close lips
|
|
caninus
|
snarling in the dog
|
|
levator nasolabialis
|
lifts nose and upper lip
|
|
levator labii superioris
|
lifts upper lip
|
|
depressor labii superioris
|
not in cat, dog
depresses lower lip |
|
lip muscles innervated by
|
cranial nerve VII (facial nerve)
|
|
|
|
|
|
|
|
cheeks
|
form walls of oral cavity caudal to lips
together with lips form vestibule layers as for lips |
|
buccinator muscle
|
function to return blood from vestibule to oral cavity proper
extend from upper jaw to mandible |
|
palate
|
roof of oral cavity, separates oral cavity from nasal cavity
compromised of hard and soft palates |
|
hard palate
|
bone covered by thick mucosa which from ridges (ruga)- guide food backwards
|
|
soft palate
|
muscosal layers separated by salivary glands and 3 paired muscles which shorten, tense and raise the palate
|
|
|
|
|
root of tongue is attached to
|
hyoid appratus (fine bony structure suspended from skull)
|
|
body of tongue is attached to
|
mandible (rostral to root)
|
|
apex of tongue is
|
free end, rostral to body, can move around
|
|
frenulum
|
connects tongue to floor of oral cavity
|
|
intrinsic tongue mousles
|
longitutidal, transverse, verticule bundles
|
|
extrinsic tongue muscles
|
various muscles which originate on the hyoid apparatus or mandible, insert in the tongue and act to elevate, protrude, or retract the tongue
|
|
filiform papilla
|
most abundent
protection points directed caudally |
|
conical papilla
|
enlarged filiform papilla, roughness of cats tongue
|
|
fungiform papilla
|
carry taste buds
evenly dispursed |
|
vallate papilla
|
carry taste buds
4-6 present larger fungiform |
|
foliate papilla
|
carry taste buds
|
|
taste buds
|
clusters or specialised cells embedded in epithelium covering papilla
base cells in contact with fibers of nerves that convey sense of taste to brain |
|
nerve fibres that convey sense of taste to brain
|
cranial nerve VII (facial)
IX (glossopharyngeal) |
|
motor innervation
|
all intrinsic and extrinsic muscles innervated by cranial nerve XII (hypoglossal)
|
|
Sensory innervation
rostral 2/3 |
cranial nerve V (trigeminal)
|
|
sensory innervation
caudal 1/3 |
cranial nerve IX ( gloosopharyngeal)
|
|
taste
rostral 2/3 |
cranial nerve VII (facial)
|
|
taste
caudal 1/3 |
cranial nerve IX (glossopharyngeal)
|
|
|
|
|
jaw closing muscles are innervated by
|
mandibular branch of trigeminal nerve (cranial nerve V)
|
|
Temporalis muscles
|
origion on extensive area of lateral surface of cranium and insertion on coronoid process of mandible
contraction pulls mandible upward large in carnivores, relatively small in herbivores |
|
masseter muscle insertion and origion
|
origion- maxillary region of skull and zygomatic arch
insertion- wide area of caudal mandible |
|
masseter muscle actions
|
raise mandible (close jaws)
move lower jaw laterally when contracted on one side- greater sideways movement in herbivores protrude lower jaw |
|
pteygoid muscles insertion and origion
|
medial to mandible
origion- pterygopalatine region of skull insertion- medial face of mandible |
|
|
|
|
digastricus muscle innervation
|
both by mandibular branch of trigeminal nerve and facial (cranial nerve VII)
|
|
digastricus origion and insertion
|
origion- occipital bone of skull, caudal to tempormandibular join
insertion- on mandible |
|
digastricus action
|
open jaw
|