ANSC 3080 Lecture 4: Species Differences in GIT and Ruminant Digestion

• School: University of Guelph
• Department: Animal Science
• Course: ANSC 3080
• Professor: Julie Kim

Document Summary

Stomach: chicken vs pigs stomach, site of chemical digestion, chicken has 2nd stomach for chemical digestion, site of mechanical digestion, birds use gizzard for mechanical digestion along with grit. Reticulorumen: where microbial fermentation occurs, chemcical digestion via microbial fermentation, papillae in ventral rumen to absorb products of microbial digestion (chemical digestion, mechanical digestion of feed due to mixing action. Ingested food (ingesta) can only only leave the reticulorumen if it reaches a critcical particle size (ps: attains ps by physical and chemical digestion, can enter omasum now. Omasum: sheets of muscular laminae (leaflike folds, has small papillae on them to grind the feed called manyplies, sorts feedstuff so the larger sized particles are kept in the reticulorumen. Abomasum: goes from omasum to absomasum, true stomach in ruminats, same as the monogastric stomach. Jejenum longest section in si and site for most digestion and absorption.