Ruminant Anatomy/Physiology-French Flashcards
What is the difference in the orientation of the abdominal organs in a newborn calf, 5 year old cow and a heavily pregnant cow?
Newborn: large abomasum
5 yr old: large rumen on L side pushing liver cranially
Heavily pregnant: uterus displaces rumen dorsally and abomasum cranially
How many gallons of fluid can the rumen hold?
What allows suckling calves to bypass the rumen?
The oesophageal groove- directs milk into the abomasum
What should be done for a calf who never developed an oesophageal groove?
Start on grain diet earlier on to initiate development of the rumen
What are the three main contents in the rumen that assist with breakdown of feed?
Bacteria: digest cellulose
Protozoa: controls bacterial population and can be seen with naked eye (light microscope)
Fungi: aids bacteria with cellulose digestion
What is the purpose of auscultating the rumen?
Find the rate and strength of the rumen contractions
What is the main job of the omasum?
Pull all the water from the rumen (“Hydration Center”)
What portion of the forestomachs is the “true stomach”?
Abomasum- enzymes located here for digestion
Complete absence of reticuloruminal motility
Direct depression of gastric center
Failure of vagal or motor pathways
Reduction in frequency or strength of primary contraction
What indicates the overall health of the ruminant?
Frequency of primary contractions
What are strength of rumenal contractions determined by?
Observing movements and loudness of sounds
What is involved in the secondary cycle of the reticuloruminal motility?
Imperative that the cow burps (eructation)
If the gas cap isn’t released it may indicate there is too much grain/fluid in rumen leading to bloat
What is the process of rumination (cud chewing)?
Ingesta goes into rumen –> cow is signaled to regurgitate –> chew again and re-swallow.
Purpose of this is to get more saliva in rumen (contains bicarb) allowing the rumen to be neutralized
What five components are taken into consideration when examining feces?
Amount Color Odor Consistency Degree of digestion