General
Rumen/Reticulum
Omasum/Abomasum
Motility
Blood/Nerve Supply
100
What type of animals have polygastric Stomachs?
Ruminants and Pseudoruminants
100
Where are you able to best access the Rumen for palpation, oscillation and surgery?
The Paralumbar fossa on the Left side
100
What is another name for the abomasum and why?
the "True Stomach"
Its the only compartment that secretes digestive enzymes
100
What inhibits rumen motility and rumination?
lack of distention
Severe distention
pH<5.0
100
What branch off of the aorta supplys the rumen?
Celiac artery
200
What are the layers layers/zones of the contents in the rumen?
Gas cap, Solid zone (plant mat), Slurry zone, Liquid zone
200
What pattern is formed by the network of reticular crests on the walls of the reticular cells?
Honeycomb Pattern
200
What is the Main function of the omasum?
Water absorption along with water-soluble nutrients and minerals
200
What is zone is expelled from the rumen during cycle B?
Gas cap
200
What artery supplies the omasum and then goes to supply the lesser curvature of the abomasum?
Left gastric artery
300
What is the space between the superficial leaf and deep leaf called?
Omental bursa
300
What are the main functions of the rumen?
Fermentation, and Digestion of cellulose via microbial action.
Production of VFAs
Generation of gas
300
What is unique about the appearance of the inside of the omasum?
The laminae are leaf like and sickle shaped like book pages
300
What rumen cycle does eructation occur and when does it occur?
B cycle
Occurs after 2-3 A cycles
300
What is the main artery of the Rumen and what groove does it pass through?
Right Ruminal artery that passes through the right accessory groove
400
When is the gastric groove open?
In young animals while drinking milk caused by a vagal reflex stimulation by suckling
The presence of ADH in adult animals caused by thirst or the oral administration of salts
400
What disease is caused by a foreign object piercing through the wall of the reticulum and causes inflammation of the surrounding peritoneum ?
Traumatic Reticulo-peritonitis "Hardware Disease"
400
What is the main function of the abomasum?
Secretion of digestive enzymes and acids
400
When does rumination occur and what does it indicate?
Right before an A cycle and indicates an animals well being
400
What trunk of the vagus nerve supplys parasympathetic innervation to the Rumen?
The Dorsal trunck
500
What omentum covers the lesser curvature of the abomasum the omasum and the reticulum?
Lesser omentum
500
What Grooves are indicated by the blue and red lines and what is their purpose?
Blue: Viseral Coronary Dorsal Groove- Divides the coronary dorsal blind sac
Red: Viseral Coronary Ventral Groove- Divides the coronary ventral blind sac
500
What organ is the omasum in contact with causing a depression?
The liver
500
What happens when the cranio-caudal ventral sacs of the rumen contract?
Small particles and fluid are pressed dorsall and flow into the cranial sac and reticulum while coarse fibers rmain in the dorsal sac.
500
What role do the splanchnic nerves play in the funtion of the rumen?
Sympathetic Innervation that Inhibits motility and regulates blood flow