Week 12: Equine GI Flashcards
The tunica flava abdominis is associated with what muscle?
External abdominal oblique
Special feature of the esophagus in the horse
Cardiac sphincter is extremely tight, meaning there is no reguritation
Parts of the equine stomach include
- Non-glandular mucosa (fundus)
- Glandular mucosa
What divides the non-glandular and glandular mucosa of the stomach?
Margo plicatus
Parts of the duodenum
- Cranial flexure
- Descending
- Caudal flexure
- Ascending
- Duodenocolic fold
Jejunum is suspended by
The root of the mesentary
Parts of the ileum
- Ileocecal fold
- Ileocecal orifice
- Ileal papilla
Large intestines possess ____ _____ (bands) and _____ (pouches), which are variable in number from one region to another
- Taenia coli
- Haustra
Parts of the cecum
- Base
- Body
- Apex
- Cecocolic fold
Parts of the ascending colon
- Right ventral colon
- Ventral diaphragmatic (sternal) flexure
- Left ventral colon
- Pelvic flexure
- Left dorsal colon
- Dorsal diaphragmatic flexure
- Right dorsal colon
Parts of the large intestine
- Cecum
- Ascending colon
- Transverse colon
- Descending (small) colon
- Rectum
Are the right parts of the ascending colon fixed or mobile?
Fixed
Are the left parts of the ascending colon fixed or mobile?
Mobile
Are bands present in the small intestine?
Nope
Bands (taeniae coli) are longitudinal thickenings of
The tunica muscularis
How many bands does the cecum have?
4
How many bands do the right ventral colon, ventral diaphragmatic flexure, and left ventral colon have?
4
How many bands do the pelvic flexure and left dorsal colon have?
1
How many bands do the dorsal diaphragmatic flexure and the right dorsal colon have?
3
How many bands do the transverse colon and the descending colon have?
2
The dorsal band of the cecum leads to
The ileocecal fold
The lateral band of the cecum connects to the
- Ventrolateral band of the colon
- “Cecocolic fold”
Haustra result from
The shortening of the teniae
Haustra are more prominent in what part of the colon?
Ventral colon
What are the visceral projections on the left abdominal wall?
- Liver
- Stomach
- Spleen
- Descending colon
- Jejunum
- Left dorsal colon
- Left ventral colon
What are the viscera located between the left costal arch and the tuber coxae? What quadrants are they in?
- Left dorsal quadrant: Jejunum and descending colon
- Left ventral quadrant: Left ventral and left dorsal ascending colon
What are the visceral projections on the right abdominal wall?
- Liver
- Right kidney
- Descending duodenum
- Right dorsal colon
- Cecum
Base of the cecum is in contact with what?
- The abdominal roof
- Connected to right kidney via the peritoneum attachment
Location of the base of the cecum
Between the tuber coxae and the 15th rib
The body of the cecum extends what direction, and is in contact with what?
- Cranioventromedially
- The right flank
Where does the apex of the cecum terminate?
Near the xiphoid cartilage between the right ventral colon and the left ventral colon
Relationship of the ileum and cecum in ruminants
Ileum enters the large intestine at the cecocolic junction
Relationship of the ileum and cecum in carnivores
There is an ileocolic orifice and a cecocolic orifice.
There is no ileocecal orifice.
Relationship of the ileum and cecum in equine
There is a ileocecal orifice and a cecocolic orifice
What artery supplying the ileum in the dog is absent in the horse?
Antimesenteric ileal branch of the cecal branch of the ileocolic artery
In the horse, what supplies the cecum?
- Cecal artery of the ileocolic artery
- Lateral and medial cecal arteries of the ileocolic artery
The right colic artery supplies what in the horse?
- Right dorsal colon
- Left dorsal colon
The colic branch of the ileocolic artery supplies what in the horse?
- Left ventral colon
- Right ventral colon
