1. The Digestive System

2. Where do we get the nourishment we need?
From the foods we eat and drink

3. Define Digestion Absorption
The mechanical and chemical breakdown of foods
Mechanical: Mashing and tearing of food
Happens in the mouth with our teeth and in our stomach with muscles
Chemical: Breaking food down with secretions
Absorption
The passage of digested food from the digestive tract to the cardiovascular system

4. Define
Elimination
The body’s expulsion of undigested food or body wastes

5. Uvula What is the purpose?
This prevents food from entering the nasal passage

6. Epiglottis
Prevents food from entering the respiratory system

7. The Esophagus
The 10 inch muscular tube that food travels down to get to the stomach
Peristalsis
Is the muscular movement that the digestive system uses to move food/material down it’s tract

8. The Stomach Is a hollow muscular sac that helps process food.
It has three important jobs
1. Mixing foods with gastric juices
2. Storing partially digested food and liquid
3. Moving food into the small intestine
Chyme is food broken down in liquid form

9. Fluid from the pancreas, liver, and gallbladder mix to continue digestion.
They secrete fluid to help break down fats, proteins, and carbohydrates

10. The Small Intestine
It is feet in length and about 1 inch in diameter
The main purpose is to:
Complete the digestion process
Absorb the nutrients
The food that isn’t absorbed gets passed on to the large intestine

11. The Large Intestine It’s about 5-6 feet in length Main job is to
absorb water, vitamins, salts, and to get rid of wastes

12. Things to do to keep your digestive system healthy
Eat a variety of low-fat, high-fiber foods
Wash your hands
Eat slowly and chew your food well
Drink at least 8 glasses of water a day

13. Digestive System Disorder Activity!
We will break up into small groups.
Your group needs to create a skit to show us your digestive system disorder and what it’s symptoms are, how to prevent it, and how to treat it.