Comparative Lab Flashcards
What structure does the greater omentum develop from?
Dorsal mesogastrium
What areas does the great omentum attach?
Greater curvature of the stomach
What structure is located within the superficial leaf of the greater omentum?
Spleen
What structure lies within the deep leaf of the greater omentum?
Left lobe of pancreas
What is this?
Cardiac or pyloric glands
Glandular epithelial cells: mucus producing cells
What is this?
Proper gastric glands
Glandular Epithelial cells : Parietal cells , Chief cells
What do parietal cells produce?
H+ and Cl-
What do chief cells produce?
Pepsinogen and rennin
What feature in horses differentiates the glandular from non-glandular regions?
Margo plicatus
In horses, what is the distribution of the glandular region?
The cardiac region is narrow.
Glandular region is mainly proper gastric glands and pyloric glands
What is a unique feature in the pig stomach?
Gastric diverticulum, torus pyloricus
What is the distribution of glands in the pig stomach?
The cardiac glands 1/3
Remainder is proper gastric and pyloric glands
What is the structure of the ruminant stomach?
Rumen, Reticulum, Omasum : non glandular, referred to as forestomach
Abomasum: glandular
Function of rumen
Fermentation vat in which microorganisms act on ingests to produce short chain volatile fatty acids to produce energy
Reticulum and Omasum function
Mechanically break down ingesta
Pathway through compound stomach of adults
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
What is the longitudinal separation of the rumen?
Longitudinal groove into dorsal and ventral sacs
What is the vertical groove dividing?
Coronary groove
L/R dorsal coronary groove
L/R ventral coronary groove
What groove separates the rumen and reticulum?
Ruminoreticular groove
What groove does the greater omentum attach to of the compound stomach?
Longitudinal grooves
What is the reticular/esophageal sulcus?
Begins at cardia, ends at reticulo-omasal orifice
This allows ingested fluids from esophagus directly into the abomasum
What is the distribution of glands of the ruminant stomach?
Primarily proper gastric glands. Narrow rim of cardiac glands and small region of pyloric glands
What does the pancreas develop from?
Mesoduodenum
The duct of the exocrine pancreas drains where?
Duodenum
What lobes of the liver is the gallbladder between?
Right medial and quadrate lobes
What artery is the ileum vascularized by?
Antimesenteric ideal artery
The cat cecum is ____ convoluted than the dog.
Less
Transition between ascending and transverse portions of colon is marked by the :
Right Colic Flexure
Transition between the transverse and descending portions of colon marked by:
Left colic flexure
In horses, the ileum enters the cecum at the:
Ileocecal junction
LI is characterized by what 2 structures:
Tania and Haustra
Horse colon pathway
Right ventral colon, sternal flexure, left ventral colon, pelvic flexure, left dorsal colon, diaphragmatic flexure, right dorsal colon
What does the large intestine of ruminants look like?
Ascending colon is lengthened and pulled causally. It is composed of proximal, spiral, and distal loops
What does the pig LI look like?
Instead of spiral, it is a cone
Dorsal mesogastrium is considered what structure?
Greater omentum
What does the ventral mesogastrium persist as?
Lesser omentum and falciform ligament
What organ develops in the ventral mesogastrium ?
Liver
Where is the falciform ligament located?
Between liver and ventral abdominal wall
In ruminants the greater omentum attaches to ?
From abomasum to rumen
Where does the epiploic foramen enter?
Enters the omental bursa
What is the Supraomental recess
A compartment which is dorsal to the deep leaf and contains most intestines
