Gastrointestinal Tract Flashcards
What is the space between the lips/cheek and teeth/gums?
oral vestibule
What is the mucocutaneous junction?
Where the lips meet the oral vestibule
Primary support of the cheek?
m. buccinator
What term is used to describe where the superior and inferior labia meet?
commissures of the lips
What two mm. anchor the tongue?
m. hyoglossus (to hyoid) m. genioglossus (to mandibular genu)
What is the name of the dense connective tissue rod found in canine tongues?
lyssa
What two kinds of papilla are found on the rostral 2/3rds of the tongue? Which is associated with taste buds?
filiform and fungiform, fungiform have taste buds
What pharyngeal structure is unique to equidae?
pharyngeal recess, a pocketing near the opening to the auditory tube
What pharyngeal structure is unique to porcidae?
pharyngeal diverticulum, a deep pocketing just dorsal to the palatopharyngeal fold
What is the name of the air-filled diverticula of the auditory tube that is unique to perissodactyls?
guttural pouches
What structures can be seen through the walls of the guttural pouches?
internal carotid a. external carotid a. Cr. nn. VII, IX, X, XI, and XII stylohyoid bone
Which branch of the nervous system (symp/parasymp) controls secretion of the mucous portion of saliva? Serous portion?
mucous portion - sympathetic NS serous portion - parasympathetic NS
Which salivary gland empties out of the parotid papilla?
parotid salivary gland
Which salivary glands empty out of the sublingual caruncle?
mandibular salivary gland and monostomatic part of sublingual salivary gland
What is the general term for an accumulation of saliva within tissue?
sialocele
What is the specific term for a sialocele (accumulation of saliva within tissue) located in the floor of the mouth? Which salivary gland is this condition associated?
ranula, sublingual glands/ducts
True or false? Tonsils have afferent lymphatic vessels.
False. Tonsils are lymph nodules that drain to proper lymph nodes.
In heterodontic mammals, _______ teeth precede adult teeth.
deciduous
What is the name of the space between canines and premolars in the equine mouth?
diastema
In ruminants, what replaces the upper incisors and canines?
dental pad
What is it called when teeth of one arcade make contact with teeth of the opposing arcade?
“coming into wear”
True or false? Deciduous dentition includes incisors, canines, and some premolars.
True. There are no deciduous molars.
The teeth of carnivores are classified as what kind of teeth?
brachyodontic, the proportion of crown to root is approximately even.
True or false? The cheek teeth of equidae are considered “open rooted”?
False. Equine cheek teeth are hypsodontic, meaning the crown (clinical + reserve) is proportionally larger than the root. Only the tusks of boars and the incisors of rodents/rabbits are open rooted.
What substance covers the exposed portion of a tooth crown?
enamel
What is contained in the pulp cavity of a tooth?
blood vessels, lymphatic vessels, and nerves
What is the name of the narrowed waist of a tooth that divides crown from root?
cervix
What type of joint is found between a tooth and the alveolar socket?
gomphosis joint
What is the name of the groove between the crown of a tooth and the surrounding gingiva?
gingival sulcus
What is the dental formula of a canid?
3142 ——- 3143
What is the dental formula of a equid?
3133 —— 3133
What is the dental formula of a ruminant?
0033 ——– 4033
What is the dental formula of a felid?
3131 —— 3121
What is the dental formula of a porcid and the ancestral default?
3143 ——- 3143
What is the mesial surface of a tooth?
towards the arcade midline
What is the distal surface of a tooth?
away from the arcade midline
What is the occlusal surface?
the grinding surface
What is the name of the tooth surface facing the oral vestibule?
labial/buccal surface
What is the name of the tooth surface facing the oral cavity?
lingual/palatal surface
What is the name of the line where the oral mucosa becomes firmly attached to the underlying periosteum?
mucogingival line
What fills the pulp cavity of a tooth as enamel is worn away?
secondary dentin
What connects the cementum of a tooth to the alveolar bone?
periodontal ligament
What is the result of an abscessed canine tooth blowing out toward the nasal cavity?
oronasal fistula
Which teeth are considered the carnassial teeth?
last upper premolar and first lower molar (108/208 + 409/309)
True or false? The upper 4th premolar of the canine is a two-rooted tooth.
False. This tooth has three roots.
What is the name of the vertical ridge on the labial surface of equine cheek teeth?
cingula (s. cingulum)
What are “eruption bumps”?
visible/palpable bony enlargements on the lower jaw of young horses that may occur during eruption of adult cheek teeth
What is the name of the vestigial upper 1st premolar of an equine dental arcade?
“wolf tooth”
Where do you find “points” on herbivore cheek teeth?
labial surface of upper tooth and lingual surface of lower tooth
Where do you find “hooks” on herbivore cheek teeth?
mesial surface of upper 1st premolar and distal surface of lower 3rd molar
What is the cranial border of the abdominal cavity?
diaphragm
What is the name of this landmark (shaded in blue)?
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paralumbar fossa
What are the borders of the paralumbar fossa in cattle?
transverse processes of the lumbar vertebrae
tuber coxae
costal arch
What is the name of the yellowish elastic connective tissue that helps to support the weight of the abdominal cavity?
tunica flava
What is the name of the section of skin that connects the flank and thigh?
fold of the flank
What are the apertures of the abdominal cavity? (Hint: where are hernias possible?)
3 in diaphragm (caval foramen, esophageal hiatus, aortic hiatus)
inguinal rings
umbilicus
pelvic outlet
What is the name of the abdominal seam that is commonly a target for surgical incision?
linea alba
What are the 4 layers of mm. that support the abdominal cavity?
From external to internal:
external oblique m.
internal oblique m.
m. rectus abdominus
m. transversus abdominis
What condition occurs when the intestine becomes trapped inside epiploic foramen?
epiploic entrapment
What condition occurs when intestine migrates dorsal to the nephrosplenic ligament?
nephrosplenic entrapment
What are the three ligaments of the liver?
coronary ligament (attaches liver to diaphragm)
falciform lig. (attaches liver to umbilicus)
round lig. (former umbilical vein, found at free edge of falciform lig.)
What are the three ligaments of the urinary bladder?
median lig.
2x lateral ligg.
What is the sacculus rotundus?
What is the saccus cecus?
Enlarged fundus of equine stomach
What are the three portions of colon in rabbits?
Proximal colon, fusus coli, and distal colon
What process does lagomorphs have that is similar to chewing cud in ruminants?
cecotrophy, making cecotropes
What is the rhamphotheca?
rhinotheca + gnathotheca
bony structure on the beak
Where is the kidney located in birds?
renal fossa of the synsacrum