Comparative Lab

Question 1

What structure does the greater omentum develop from?

Answer 1

Dorsal mesogastrium

Question 2

What areas does the great omentum attach?

Answer 2

Greater curvature of the stomach

Question 3

What structure is located within the superficial leaf of the greater omentum?

Answer 3

Spleen

Question 4

What structure lies within the deep leaf of the greater omentum?

Answer 4

Left lobe of pancreas

Question 5

What is this?

Answer 5

Cardiac or pyloric glands
Glandular epithelial cells: mucus producing cells

Question 6

What is this?

Answer 6

Proper gastric glands
Glandular Epithelial cells : Parietal cells , Chief cells

Question 7

What do parietal cells produce?

Answer 7

H+ and Cl-

Question 8

What do chief cells produce?

Answer 8

Pepsinogen and rennin

Question 9

What feature in horses differentiates the glandular from non-glandular regions?

Answer 9

Margo plicatus

Question 10

In horses, what is the distribution of the glandular region?

Answer 10

The cardiac region is narrow.
Glandular region is mainly proper gastric glands and pyloric glands

Question 11

What is a unique feature in the pig stomach?

Answer 11

Gastric diverticulum, torus pyloricus

Question 12

What is the distribution of glands in the pig stomach?

Answer 12

The cardiac glands 1/3
Remainder is proper gastric and pyloric glands

Question 13

What is the structure of the ruminant stomach?

Answer 13

Rumen, Reticulum, Omasum : non glandular, referred to as forestomach
Abomasum: glandular

Question 14

Function of rumen

Answer 14

Fermentation vat in which microorganisms act on ingests to produce short chain volatile fatty acids to produce energy

Question 15

Reticulum and Omasum function

Answer 15

Mechanically break down ingesta

Question 16

Pathway through compound stomach of adults

Answer 16

Ingesta -> Rumen/reticulum -> redirected to esophagus where it is regurgitated into the mouth as cud and rechecked ->re swallowed into rumenoreticulum -> omasum -> abomasum -> glandular secretions added -? Duodenum

Question 17

What is the longitudinal separation of the rumen?

Answer 17

Longitudinal groove into dorsal and ventral sacs

Question 18

What is the vertical groove dividing?

Answer 18

Coronary groove
L/R dorsal coronary groove
L/R ventral coronary groove

Question 19

What groove separates the rumen and reticulum?

Answer 19

Ruminoreticular groove

Question 20

What groove does the greater omentum attach to of the compound stomach?

Answer 20

Longitudinal grooves

Question 21

What is the reticular/esophageal sulcus?

Answer 21

Begins at cardia, ends at reticulo-omasal orifice
This allows ingested fluids from esophagus directly into the abomasum

Question 22

What is the distribution of glands of the ruminant stomach?

Answer 22

Primarily proper gastric glands. Narrow rim of cardiac glands and small region of pyloric glands

Question 23

What does the pancreas develop from?

Answer 23

Mesoduodenum

Question 24

The duct of the exocrine pancreas drains where?

Answer 24

Duodenum

Question 25

What lobes of the liver is the gallbladder between?

Answer 25

Right medial and quadrate lobes

Question 26

What artery is the ileum vascularized by?

Answer 26

Antimesenteric ideal artery

Question 27

The cat cecum is ____ convoluted than the dog.

Answer 27

Less

Question 28

Transition between ascending and transverse portions of colon is marked by the :

Answer 28

Right Colic Flexure

Question 29

Transition between the transverse and descending portions of colon marked by:

Answer 29

Left colic flexure

Question 30

In horses, the ileum enters the cecum at the:

Answer 30

Ileocecal junction

Question 31

LI is characterized by what 2 structures:

Answer 31

Tania and Haustra

Question 32

Horse colon pathway

Answer 32

Right ventral colon, sternal flexure, left ventral colon, pelvic flexure, left dorsal colon, diaphragmatic flexure, right dorsal colon

Question 33

What does the large intestine of ruminants look like?

Answer 33

Ascending colon is lengthened and pulled causally. It is composed of proximal, spiral, and distal loops

Question 34

What does the pig LI look like?

Answer 34

Instead of spiral, it is a cone

Question 35

Dorsal mesogastrium is considered what structure?

Answer 35

Greater omentum

Question 36

What does the ventral mesogastrium persist as?

Answer 36

Lesser omentum and falciform ligament

Question 37

What organ develops in the ventral mesogastrium ?

Answer 37

Liver

Question 38

Where is the falciform ligament located?

Answer 38

Between liver and ventral abdominal wall

Question 39

In ruminants the greater omentum attaches to ?

Answer 39

From abomasum to rumen

Question 40

Where does the epiploic foramen enter?

Answer 40

Enters the omental bursa

Question 41

What is the Supraomental recess

Answer 41

A compartment which is dorsal to the deep leaf and contains most intestines