1. TURN IN FOOD PARTICLE STORY HW
Science Starter
TURN IN FOOD PARTICLE STORY HW
What is the difference between mechanical and chemical digestion?
What is the difference between canal organs and accessory organs?
Why do you think we need accessory organs?

2. Today’s Agenda Science Starter Types of Enzymes Digest This! Lab
Digestive System Model
Exit Quiz

3. IMPORTANT DIGESTIVE ENZYMES
Carbohydrates
Amylase- breaks down starch in the mouth
Maltase/Amylase- breaks down starch in the small intestine
Protein
Pepsin- cuts up protein in the small intestine (made in the pancreas)
IMPORTANT DIGESTIVE
ENZYMES
Fats
Bile Salts- produced in the liver, digests fats in the small intestine
Lipase- Breaks down fat further in small intestine (made in the pancreas)
Nucleic Acids
Nuclease- breaks down RNA/DNA in small intestine

4. Digest This! Lab Complete all 5 activities by the end of today’s class
You will need to keep time for several different activities, make sure you watch the clock!
Beakers and vinegar are located at the front table
Food items are located at the front table
Clean up lab area and place all dishes at the back sink

5. Digestive System Model
Labels/Key- All of the digestive system organs present in the model should be labeled (arrows or color key) and a short description of the function provided (i.e. Esophagus moves food by peristalsis)
Type of Digestion- Along with each description should include whether this section of the digestive system uses mechanical, chemical, or both types of digestion. (Be sure to explain what this means, i.e. mouth completes mechanical digestion by using the teeth and chemical digestion by using the saliva)
Enzymes- For the digestive organs that complete chemical digestion be sure to list any enzymes that are present.

6. Exit Quiz
Why does our body use both mechanical and chemical digestion?
What is the difference between water and the saliva in our mouth?
Where in the body does chemical and mechanical digestion work?