Equine Digestive System (15) Flashcards
Dr. Nader
What is included in the large intestines of the equine?
ascending colon - “large colon”
transverse colon
descending colon - “small intestines”
T/F: The equine stomach is monogastric
TRUE
Label 1-4
- fundus
- body
- cardia
- pylorus
What is the composition of the stomach in the equine?
glandular and non glandular stomach
What separates the glandular and non glandular stomach in the equine?
margo plicatus
What does the stomach contact? Cranially, etc
cranially: diaphragm and liver
colon, pancreas, and small intestine
How is the stomach attached on the left?
attached to the spleen by the gastrosplenic ligament
What is the function of the gastrosplenic ligament?
connects the dorsolateral greater curvature of the stomach with the lesser curvature of the spleen
The cardia/body is [glandular/nonglandular], and after the pylorus is [glandular/nonglandular]
closer to esophagus: nonglandular
after margo plicatus: glandular
In the equine, the descending duodenum is on the [right/left] side
right
on R flank side around paralumbar fossa
In the equine, what does the greater omentum connect?
the greater curvature of the stomach and initial part of duodenum with the
terminal part of the large colon and initial part of small colon which connects to dorsal body wall
In the equine, what does the lesser omentum connect?
the lesser curvature of the stomach and first part of the duodenum with the liver
*hepatogastric and hepatoduodenal ligaments
What is the epliploic foramen?
naturally occurring opening leading to the mental bursa
What are the boundaries of the epiploic foramen?
dorsocranially: caudate lobe of the liver
dorsally: caudal vena cava
ventrally: portal vein
What is the dorsocranial boundary of the epiploic foramen?
caudate lobe of liver
What is the dorsal boundary of the epiploic foramen?
caudal vena cava
What is the ventral boundary of the epiploic foramen?
portal vein
What are the flexures of the duodenum?
cranial duodenal flexure
caudal duodenal flexure
duodenojejunal flexure
Where is the jejunum located?
located from the left paralumbar fossa to the ventral abdominal floor
What are taenia? Where are they found?
large bands
longitudinal smooth muscle
large intestine
What is haustra? Where are they found?
sacculations created by taenia
transient
large intestine
Match taenia and haustra to 1 and 2
- taenia
- haustra
What is the cecum?
comma shaped organ running from the right paralumbar fossa to the ventral midline
What are the parts of the cecum?
apex
body
base
The ascending, or large colon, has what parts?
right ventral colon —> sternal flexure
left ventral colon —> pelvic flexure
left dorsal colon —> diaphragmatic flexure
right dorsal colon
List the order the passage of digesta in the colon using the terms right/left dorsal/ventral colon. You should have 4 answers
right ventral colon
left ventral colon
left dorsal colon
right dorsal colon
If a horse is in dorsal recumbency, which parts of the colon can you see?
left ventral colon
right ventral colon
descending colon
How many taenia does the right dorsal colon have?
3
How many taenia does the right ventral colon have?
4
How many taenia does the cecum have?
4
How many taenia does the left ventral colon have?
4
How many taenia does the left dorsal colon have?
1
How many taenia does the descending colon have?
2
Which part of the colon is cranial to the root of the mesentery?
transverse colon
How many taenia does the transverse colon have?
2
How many taenia does the descending colon have?
2
Where is the descending colon located?
mostly left dorsal caudal quadrant of abdomen
Which organ is this tissue representing outside the surgical drape?
traverse colon: 2 taenia
