The document provides information about the digestive system, including a diagram of the digestive system, the purpose of the digestive system and various parts like the stomach and large intestine. It discusses how the stomach and large intestine work and their purposes. It also includes 10 interesting facts about the digestive system and 10 multiple choice questions to test knowledge. Finally, it covers symptoms, treatment and prevention of stomach cancer.

1. Learn about
The Digestive System
By Jess Mays Yr9, Paeroa College,
New Zealand

2. Contents
Slide
3 The digestive System Diagram
4 The purpose of the digestive System
5 10 interesting facts
6-10 10 questions
11 Diagram of the stomach
12 The Purpose of the Stomach
How does the Stomach work
13 The large Intestine diagram
14 The Purpose of the Large Intestine
How does the large intestine work
15 Stomach Cancer: Symptoms
16 Stomach Cancer: Treatment
17 Stomach Cancer: Prevention

3. The digestive System
Back to contents

4. The Purpose of the Digestive
System
Back to contents
The purpose of the Digestive system is to break
down food and absorb nutrients.

5. 10 interesting facts
Back to contents
1. The stomach is lined with three layers of powerful muscles.
2. The liver is the largest organ in the body.
3. In the mouth, food is either cooled or warmed to a more suitable temperature.
4. The liver performs more than 500 functions.
5. The large intestine is about 5 feet long.
6. A full grown horse?? Their coiled up intestines are 89 feet long.
7. Food stays in your stomach for 2 to 3 hours.
8. About 400 gallons of recycled blood are pumped through the kidneys every
day.
9. We make 1 to 3 pints of saliva a day.
10. The average male will eat about 50 tons of food during his lifetime

6. How much do you know?
Back to contents
1. How many layers does the stomach have?
A. 4 layers
B. 1 layer
C. 3 layers
2. What is the largest organ in the body?
A. The liver
B. The stomach
C. The heart
3. What happens when food is in your mouth?
A. The food goes soggy
B. The food is either cooled or warmed
C. The food dissolves

7. How much do you know?
Back to contents
4. How many functions does the liver perform
A. 500 functions
B. 1000 functions
C. 890 functions
5. How long is your large intestine?
A. 1 foot long
B. 19 centimetres long
C. 5 feet long

8. How much do you know?
Back to contents
6. How long is a full grown horse’s intestine?
A. 100 feet long
B. 89 feet long
C. 7 feet long
7. How long does food stay in your stomach for?
A. 1 day
B. 10 minutes
C. 2-3 hours

9. How much do you know?
Back to contents
8. How many gallons of recycled blood is pumped through our kidneys
everyday?
A. 10 gallons
B. 150 gallons
C. 400 gallons
9. How many pints of saliva do we make a day?
A. 1-3 pints a day
B. 4-5 pints a day
C. 10 pints a day

10. How much do you know?
Back to contents
10. True or false the average male will eat about 50 tons of food during
his lifetime
A. True
B. False

11. Back to contents
The Stomach

12. The Purpose of the Stomach
Back to contents
1. Stores the food we ate
2. Breaks down the food into a liquidly mixture
3. Mix with Enzymes which is chemical that breaks down food.
4. Slowly empty that liquidly mixture into the small intestine.
The stomach stores the food we eat and breaks down the food into a liquidly
mixture.
How Does The Stomach Work
Once food enters the stomach through the oesophagus, it reaches the
stomach, then the acid in it breaks up the food.

13. The Large Intestine
Back to contents

14. The Purpose of the Large Intestine
Back to contents
The large intestine, or large bowel, functions mainly to absorb water from
the undigested food back into the blood. This makes the faeces more
solid.
It also absorbs vitamins made by the bacteria which live in the large
intestine.
How Does The Large Intestine
Work
By contraction of its muscular walls the food mass is sent forward and, as it is
carried along, some of the secretions from the intestinal lining, bile and the
pancreas helps break it down

15. Stomach Cancer
•Early
•Indigestion or a burning sensation (heartburn)
•Loss of appetite, especially for meat
•Late
•Abdominal pain or discomfort in the upper abdomen
•Nausea and vomiting
•Diarrhea or constipation
•Bloating of the stomach after meals
•Weight loss
•Weakness and fatigue
•Bleeding (vomiting blood or having blood in the stool), which can lead to
anemia
•To find the cause of symptoms, the doctor asks about the patient's medical
history, does a physical exam, and may order laboratory studies.
Symptoms
Back to contents

16. stomach Cancer
Treatment
Like any cancer, treatment is adapted to fit each person's
individual needs and depends on the size, location, and
extent of the tumor, the stage of the disease, and general
health. Cancer of the stomach is difficult to cure unless it is
found in an early stage (before it has begun to spread).
Unfortunately, because early stomach cancer causes few
symptoms, the disease is usually advanced when someone
finds they have it. Treatment for stomach cancer may
include surgery, chemotherapy, and/or radiation therapy.
Back to contents

17. How to prevent it?
Back to contents
Doctors cannot always explain why one person gets cancer and another
doesn't. However, scientists have studied general patterns of cancer in the
population to learn what things around us and what things we do in our
lives may increase our chance of developing cancer
Some of the risk factors for cancer can be avoided, but many cannot. Both
smoking and inheriting specific genes could be considered risk factors for
certain kinds of cancer, but only smoking can be avoided.

18. THE
END