TAMU ANSC 107 - Comparative Digestive Systems (8 pages)

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Comparative Digestive Systems

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Comparative Digestive Systems


Lecture number:
Lecture Note
Texas A&M University
Ansc 107 - General Animal Science

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ANSC 107 1nd Edition Lecture 20 Outline of previous lecture I II III Environmental physiology Factors affecting critical temperature Effects of light on animal performance a Ventilation b Animal waste management Outline of current lecture I Digestion a Monogastric b Ruminant II Urea cycle Current Lecture 1 Digestion a The breaking down process of food to allow absorption b Combination of action a Mechanical salivating b Chemical chewing stomach turning c Microbrial stomach large intestine cecum c Continuous process along alimentary canal 2 Classification of digestive systems a Monogastric a One stomach b Humans and swine b Modified monogastric a Single stomach but specialized componets that aid in digestion b Horse and birds c Ruminant These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute a More than one stomach compartment b Sheep cattle goat llamas 3 Monogastric tract a Cecum inlarge in a horse b Jujunum start absorbing amino acids c 18 24 hours its gone 4 Ruminant tract a Rumen dinosaur would prey on ruminants b Takes 72 96 hours to go through passage rate c Most important part of the rumen is bacteria inside a At winter supplement the bacteria 5 Passage rate a Monogastric a 10 20 hours b Ruminants a 96 120hours b Rumination occurs 6 8 hours a day 1 Called ruminating 6 Mouth a Salivary glands secrete a Water moistens the feed and aids in taste mechanisms b Mucin lubrication aid for swallowing c Bicarbonate salts act as a buffer to regulate stomach pH d Hormone thyroxin 1 Lubrication down esophagus e Hydrochloric acid 7 Mouth difference a Swine secretion of salivary amylase 8 Esophagus a Ingested material moves via muscular contraction know as peristaltic waves 9 Esophagus differences a Horse only one way peristaltic waves b Ruminants two way movement that allows for regurgitation of bolus for chewing of cud a Esophageal groove 10 Determination reaction a Breaks bond

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