11:067:330 Lecture Notes - Abomasum, Dietary Fiber, Cloaca
14 Oct 2020
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Document Summary
The digestive system (git--gastrointestinal tract) includes everything from the lips to the anus and the associated glands. Liver that produces necessary enzymes for protein digestion. Pancreas that produces the necessary enzymes for carbohydrate digestion: headgut the buccal cavity and pharynx. Seves for capture, prehension, and preparation of feed for deglutition. Buccal means cheek and is this case how food moves from the mouth to the intestine. Lips and teeth moving material into mouth. Salivary glands: foregut--esophagus, everything prior to the small intestine. Feeding young--birds use esophagus to help feed young. Crushing-- snakes, allows them to crush egg shells: foregut--stomach, storage, physical preparation for digestion. Rennin specific to casein: site of fermentation are ruminants. Majority of herbivores are foregut fermenters and majority of foregut fermenters. This shows you how efficient and how well adapted these animals are to the natural world. Ruminants have a distinct four chamber stomach. Pseudo ruminants have distinct three chamber stomach.
