1. The Digestive System

2. Structures Esophagus Stomach Small Intestine
Large Intestine(colon or bowel)
Rectum
Anus
Liver
Pancreas
Gall Bladder

3. Function
To break down food into smaller portions that can be absorbed into the bloodstream and delivered to the cells of the body.
This process is called DIGESTION.

4. 2 types of digestion: chemical and mechanical
Mechanical digestion mashes and grinds food into smaller pieces.
Stomach, teeth, tongue use mechanical digestion
Chemical digestion is the breaking down of food into molecules
Stomach, small intestine, and saliva use chemical digestion.

5. More on digestion Begins in the mouth
Most occurs in the small intestine

6. The digestive tract Food passes through the digestive tract
Includes the mouth, esophagus, stomach, small intestine, large intestine

7. Esophagus
Muscular tube that connects the pharynx (throat) to the stomach

8. Stomach Muscular, sac like organ
Uses chemical and mechanical digestion to break down food
Contains acid and enzymes to break down food and kill bacteria you may swallow

9. Small Intestine Smaller in diameter; longer in length
Most digestion occurs here
Lined with villi that increase surface area for nutrient absorption
Nutrients are absorbed in the bloodstream here

10. Large Intestine Stores, compacts, and eliminates waste products
Fiber helps to keep the stool(poop) soft and moving through
Last part is the rectum
Stores feces(poop) until it can be eliminated from the body
Opening is called the anus

11. Liver Not part of the DIGESTIVE TRACT aids in digestion Makes bile
Stores and absorbs nutrients
Breaks down toxins

12. Gall Bladder Not part of the DIGESTIVE TRACT aids in digestion
Stores bile that is made in the liver

13. Pancreas Not part of the DIGESTIVE TRACT aids in digestion
Neutralizes stomach acids
The body’s natural antacid (like Tums)
Produces enzymes that aid in digestion
Also part of the endocrine system