Quiz 1 - Quiz 1-key January 25, 2007 Answer 5 out of the 7...

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Quiz 1-key January 25, 2007 Answer 5 out of the 7 questions on note book paper: Name_______________________ 1. Draw a right and left side depiction of the ruminant digestive tract from the esophagus to duodenum and label as many distinct anatomical parts as possible. The left side should show the reticulum and the rumen separated into the cranial, ventral, caudal and ventral sacs that are separated by the reticular fold, cranial pillar and caudal pillar. The right side should show better views of the omasum and the abomasum. 2. What did you learn from actually inspecting the ruminant stomach of a feedlot steer performed during the dissection performed last Friday in the meat science abattoir ? I believe several items were pointed out: 1) The relative size of the omasum, second largest compartment, and its being relatively packed full of feed particles between the longitudinal leaves, the rumen, the largest compartment, appeared nearly empty, 2) there was a lack/absence of grain in rumen ingesta and the residual amount of rumen digesta present was from a hay masticate, the particle size of digesta was coarse in the rumen and more refined in the omasum and solubilized in the abomasums and intestines. 3) the cardia and the reticulo-omasal orifice were several inches apart and connected by the esophageal groove (thick muscle and connective tissue), 4) The abomasum and duodenum were difficult to ascertain from lower omasum to the small upper intestine. 5) There was a diversity of papillae in the reticulo-rumen: smooth in ventral sac and more finger like ~ 1 cm towards the dorsal sac and the honey comb ridge-like papillae in the reticulum. 6) The esophagus was more vascular as indicated by red color. 7) The internal fat was white, solid, abundant, and surrounded the intestines 8) Total size when relative empty still fills ~40 gallon garbage can. 3. In general, herbivores and most especially ruminants occupy an exclusive niche on this planet. They sustain themselves on a specialized diet that is relatively less dense in energy and protein but more abundantly available (browse and forages) as biomass. Explain why the numbers and diversity are greater for ruminant VS non- ruminant herbivores as related to their digestive tract and feed preference
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Quiz 1 - Quiz 1-key January 25, 2007 Answer 5 out of the 7...

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