1. Digestive System

2. Digestive system The body system that converts food into usable energy

3. The Process The mouth and teeth The stomach and the small intestine The liver, gallbladder, and pancreas

4. Mouth and Teeth Digestion: The process of changing food into material the body can use Digestive enzymes: Speed up the break down of food Saliva: A fluid made by the salivary glands that moistens and softens food

5. The stomach and small intestine Esophagus: A muscular tube that pushes food down from the mouth to the stomach Small intestine: A coiled, tubelike organ that is about 20 feet long where the nutrients are separated from the bulk of the food

6. Liver, Gallbladder, and Pancreas Liver: Body's largest internal organ, it produces bile, a substance that helps break down fats and gets rid of toxins from body Gallbladder: Stores the bile and releases it to small intestine when needed Pancreas: Makes additional digestive enzymes

7. Excretory System Your body’s waste removal system

8. Excretory System Excretion: The process of removing wastes from the body Colon: Food particles that cannot be digested move from the small intestine to here (aka large intestine) Cecum: A pouch that joins the small and large intestine Kidneys: Organs that filter water and dissolved wastes from the blood and help maintain proper levels of water and salts in the body