Week 12: Equine GI

Question 1

The tunica flava abdominis is associated with what muscle?

Answer 1

External abdominal oblique

Question 2

Special feature of the esophagus in the horse

Answer 2

Cardiac sphincter is extremely tight, meaning there is no reguritation

Question 3

Parts of the equine stomach include

Answer 3

• Non-glandular mucosa (fundus)

- Glandular mucosa

Question 4

What divides the non-glandular and glandular mucosa of the stomach?

Answer 4

Margo plicatus

Question 5

Parts of the duodenum

Answer 5

• Cranial flexure
• Descending
• Caudal flexure
• Ascending
• Duodenocolic fold

Question 6

Jejunum is suspended by

Answer 6

The root of the mesentary

Question 7

Parts of the ileum

Answer 7

• Ileocecal fold
• Ileocecal orifice
• Ileal papilla

Question 8

Large intestines possess ____ _____ (bands) and _____ (pouches), which are variable in number from one region to another

Answer 8

• Taenia coli

- Haustra

Question 9

Parts of the cecum

Answer 9

• Base
• Body
• Apex
• Cecocolic fold

Question 10

Parts of the ascending colon

Answer 10

• Right ventral colon
• Ventral diaphragmatic (sternal) flexure
• Left ventral colon
• Pelvic flexure
• Left dorsal colon
• Dorsal diaphragmatic flexure
• Right dorsal colon

Question 11

Parts of the large intestine

Answer 11

• Cecum
• Ascending colon
• Transverse colon
• Descending (small) colon
• Rectum

Question 12

Are the right parts of the ascending colon fixed or mobile?

Answer 12

Fixed

Question 13

Are the left parts of the ascending colon fixed or mobile?

Answer 13

Mobile

Question 14

Are bands present in the small intestine?

Answer 14

Nope

Question 15

Bands (taeniae coli) are longitudinal thickenings of

Answer 15

The tunica muscularis

Question 16

How many bands does the cecum have?

Answer 16

4

Question 17

How many bands do the right ventral colon, ventral diaphragmatic flexure, and left ventral colon have?

Answer 17

4

Question 18

How many bands do the pelvic flexure and left dorsal colon have?

Answer 18

1

Question 19

How many bands do the dorsal diaphragmatic flexure and the right dorsal colon have?

Answer 19

3

Question 20

How many bands do the transverse colon and the descending colon have?

Answer 20

2

Question 21

The dorsal band of the cecum leads to

Answer 21

The ileocecal fold

Question 22

The lateral band of the cecum connects to the

Answer 22

• Ventrolateral band of the colon

- “Cecocolic fold”

Question 23

Haustra result from

Answer 23

The shortening of the teniae

Question 24

Haustra are more prominent in what part of the colon?

Answer 24

Ventral colon

Question 25

What are the visceral projections on the left abdominal wall?

Answer 25

- Liver - Stomach - Spleen - Descending colon - Jejunum - Left dorsal colon - Left ventral colon

Question 26

What are the viscera located between the left costal arch and the tuber coxae? What quadrants are they in?

Answer 26

- Left dorsal quadrant: Jejunum and descending colon | - Left ventral quadrant: Left ventral and left dorsal ascending colon

Question 27

What are the visceral projections on the right abdominal wall?

Answer 27

- Liver - Right kidney - Descending duodenum - Right dorsal colon - Cecum

Question 28

Base of the cecum is in contact with what?

Answer 28

- The abdominal roof | - Connected to right kidney via the peritoneum attachment

Question 29

Location of the base of the cecum

Answer 29

Between the tuber coxae and the 15th rib

Question 30

The body of the cecum extends what direction, and is in contact with what?

Answer 30

- Cranioventromedially | - The right flank

Question 31

Where does the apex of the cecum terminate?

Answer 31

Near the xiphoid cartilage between the right ventral colon and the left ventral colon

Question 32

Relationship of the ileum and cecum in ruminants

Answer 32

Ileum enters the large intestine at the cecocolic junction

Question 33

Relationship of the ileum and cecum in carnivores

Answer 33

There is an ileocolic orifice and a cecocolic orifice. There is no ileocecal orifice.

Question 34

Relationship of the ileum and cecum in equine

Answer 34

There is a ileocecal orifice and a cecocolic orifice

Question 35

What artery supplying the ileum in the dog is absent in the horse?

Answer 35

Antimesenteric ileal branch of the cecal branch of the ileocolic artery

Question 36

In the horse, what supplies the cecum?

Answer 36

- Cecal artery of the ileocolic artery | - Lateral and medial cecal arteries of the ileocolic artery

Question 37

The right colic artery supplies what in the horse?

Answer 37

- Right dorsal colon | - Left dorsal colon

Question 38

The colic branch of the ileocolic artery supplies what in the horse?

Answer 38

- Left ventral colon | - Right ventral colon