1. Digestive System

2. Functions
Read page 225 to find the 3 functions of the digestive system
List them in your book

3. Functions
To digest food (mechanical digestion occurs when food is chewed, mixed, and churned) (Chemical digestion- when chemical reactions break down large molecules of food)
To absorb nutrients into the blood stream
To eliminate (release) solid waste

4. Organs and their jobs
Read about the mouth, tongue, and teeth and describe their job in the digestive system page 228

5. Functions of Mouth, tongue, and teeth
Mouth - Where mechanical digestion begins when teeth bite and tear food
Tongue moves food and mixes it with saliva (chemical digestion)
Tongue pushes food to the back of throat to swallow

6. Esophagus
Read about the esophagus on page 228 and tell it functions

7. Functions of Esophagus
Connects the mouth to the stomach
Mucous glands keeps food moist as it travels to stomach
Smooth muscles in the wall of the esophagus move the food down through a squeezing action called peristalsis

8. Stomach
Read about and list the functions of the stomach Page 229

9. Functions of the Stomach
Food is mixed and broken down by peristalsis (squeezing) in the stomach (mechanical digestion)
Food is also mixed with enzymes and hydrochloric acid to break it down chemically (chemical digestion)
Adds mucus to the food to help keep it moist for digestion and to protect the walls of the stomach

10. Small Intestine
Read about the functions of the small intestine on page 230.

11. Functions of small intestine
Small amount of digestion occurs at the beginning of the small intestine (chemical digestion)
Absorption of the food nutrients into the blood stream occurs in the rest of the small intestine (it is absorbed by fingerlike projections called villi)
Peristalsis of the muscles in the small intestine moves the food

12. Large intestine
Read page 231 about the large intestine

13. Functions of the Large intestine
To absorb water from the undigested food
This keeps water in your body and keeps the body in homeostasis
The solid food then goes to the rectum and waits to be released through the anus

14. Liver and Gallbladder
Read page 230 to find out information on the liver and gallbladder

15. Function of Liver/Gallbladder
Liver produces a green fluid called bile
The bile is sent to the gallbladder to be stored
The bile is then sent to the small intestine where it breaks down fat molecules

16. Pancreas
Read about the Pancreas on page 230

17. Functions of the Pancreas
Release digestive juice that help the digestion of carbohydrates, proteins, and fats
Makes insulin a hormone that allows glucose to pass into the blood stream