DASC20010 Lecture Notes - Lecture 19: Gastrointestinal Physiology, Abdominal Wall, Ruminant

• School: University of Melbourne
• Department: Animal Science
• Course: DASC20010
• Professor: Peter Cakebread

Document Summary

Learning objectives: basic structure of digestive system & digestive tract wall, regulation gastrointestinal motility & processes, regulation of saliva secretion, functional anatomy of the stomach, stomach motility, ruminant fore-stomach motility. Basic structure & processes: food is processed into chime through process of digestion, prehension, chemical breakdown, absorption of nutrients, elimination. Helps resist infection, a lot of circulation and protective tissue. Important for supporting and protecting the intestine: serosa- protective layer for outer part of the small intestine- serosa on the outside and then 2 layers of muscle going from outer layer to the inner layer. Inner layer of git- mucous membrane- always secreting- ideal circumstances to grow a lot of bugs- cultures needed for normal gut flora and health. Gastrointestinal hormones: within mucosa of certain regions of digestive tract- endocrine glands, gastrointestinal hormones- carried through blood to other areas of digestive tract- exert excitatory or inhibitory influences on smooth muscle and exocrine gland cells.