1. Livestock Nutrition:Digestive System
Created by: Arlene Barrett, Dennis Bratton, Mariah Gumphery ,Haley Vrazel

2. Objectives Summarize terms related to digestive system.
Review the digestive system.

3. Terms
Nutrient
Nutrition
Gastrointestinal Tract
Digestive Stystems

4. Nutrient
A substance or group of substance of similar chemical structures that aid in the support if life.

5. Nutrition
A science that deals with the way an animal brings in a feed stuff and utilizes it through various processes and metabolic activities.

6. Gastrointestinal Tract
A tube that allows feed stuff to be stored (middle) digested (middle), absorbed (middle) and excreted (exit).
A tube with a hollow cavity with a portion in the middle with cavities that are followed with an outlet.

7. Digestive Systems
Man and pig have a simple stomachs (non- ruminants) with an extensive intestinal system
Ruminants have a complex stomach with a simpler intestinal system

8. Digestive System Mouth: “Prehension” tool (grasps food)
Salivary glands secrete juices containing enzymes (digest food)
Chewing food breaks down
Esophagus: muscular tube that connects mouth to stomach
Peristaltic Movement: sequential contraction of ringlike muscles
Reverse Peristalsis = vomiting

9. 2 Major Digestive Systems
Both systems will be addressed in detail in the lesson to follow:
Ruminants (Polygastrics)—have four stomach compartments
Non-Ruminats (Monogastrics)—have one stomach compartment

12. Digestive System
Small Intestine: long coiled tube connecting stomach to large intestine
rest of the digestion and absorption takes place here
surface covered with villi (increase surface area and absorption)
Large Intestine: Cecum, colon, rectum
absorbs water (makes feces more solid)
some vitamins and minerals absorbed here

13. Digestive System Accessory organs:
Pancreas secretes enzymes to break down fat
Liver (largest internal organ) secretes bile, which digests fats
also stores iron

14. Review Summarize terms related to digestive system.
Review the digestive system.

15. Lab Activity
Students will illustrate the swine and cattle digestive system.