University:
Sam Houston State University
Course:
BIOL 1406 | General Biology I
Academic year:

2020
Views:

354

Pages:

10
Author:

StellarSymphony

Ruminant Digestive System Modified to handle the breakdown of large amounts of fiber Ruminant Digestive System • Mouth – no upper incisors, hard palate – molars for grinding coarse vegetation – saliva does not contain enzymes • Esophagus – muscular tube connecting the mouth to the stomach Ruminant Digestive Systems • • • • The Four Compartmented Stomach Rumen: storage area and fermentation vat Reticulum: nails and wire may be found here-hardware stomach Omasum: eliminates excess water from feed Abomasum: true stomach, gastric juices and enzymes are secreted Ruminant Digestive Systems Stomach (cont.) • Regurgitation: first step in rumination – large quantities of roughage are consumed and are chewed just enough to swallow – after swallowing, regurgitation (“cud chewing”) takes place, food is re-chewed Ruminant Digestive System • Small Intestine – – – – connects stomach to large intestine food nutrients absorbed into blood contains bile and pancreatic juices pushes food through by muscle contractions Ruminant Digestive System • Large Intestine – Contains Cecum, Colon and Rectum • Cecum: sac at junction of small intestine and large intestine • Colon and rectum: at end of system – not as long as small intestine, but larger in diameter – water and some nutrient absorption occurs here – where residue solidifies before excretion Monogastric Digestive System Characterized by inability to digest roughage efficiently Objectives • Describe the structures and functions of the digestive system of non-ruminant animas • Draw the structures of the digestive system of non-ruminant animals • Label the structure of the digestive system of non-ruminant animals Monogastric Digestive System • Mouth – has upper and lower incisors – digestive enzymes secreted which breaks down nutrients • Esophagus – connects mouth to stomach Monogastric Digestive System • Stomach – secretes Hydrochloric Acid to break down nutrients – enzymes such as pepsin also secreted here – churning action mixes food – small and large intestine • function just as in ruminant systems