1. Digestive System
Frog vs. Human

2. Mechanical Digestion Breaking down of food into smaller pieces
Mouth –chewing
Stomach - churning

3. Chemical digestion Breaking food down into small molecules
In mouth saliva breaks down carbohydrates
In stomach, acid breaks down protein
In small intestine (duodenum), breakdown fats, proteins and carbohydrates

4. Food travels from mouth to anus
Mouth – mechanical and chemical digestion of starch
Esophagus – peristalsis moves food from mouth to stomach
Stomach – mechanical and chemical digestion of protein
Small intestine – chemical digestion of fat, protein and carbohydrates
Small intestine – absorb nutrients through villi

5. In the duodenum
Liver secretes bile from the gall bladder into the duodenum to chemically breakdown fat
Pancreas secretes enzymes to complete the digestion of starch, fat and carbohydrates

6. Large Intestine Absorption of water
Removal of undigested waste, fiber and dead cells

7. Frog digestive system

8. interactives http://sciencenetlinks.com/interactives/systems.html