Primary project

1. DIGESTIVE
SYSTEM.
BY SANAYA, PAULA AND
IRENE.

2. WHAT DOES IT DO?
It extracts the nutrients from the food.
NUTRIENTS

3. WHAT DOES IT DO?
It expels the waste products that our
body doesn’t need.

4. 1st
STEP
In the mouth, the teeth chew the food. The
salivary glands produce saliva and saliva
mixes with food and makes a bolus.

5. 2nd STEP
Then, the bolus goes to a small tube called
oesophagus.
OESOPHAGUS

6. 3rd STEP
Next, the bolus reaches the
stomach.

7. 4th STEP
After that, the gastric juices break down the
bolus and transform it into a thick liquid.

8. 5th STEP
The gastric juices also kill dangerous bacteria.

9. 6th STEP
The bile produced by the liver and the
pantreatic juices produced by the pancreas are
mixed with the thick liquid.
Pancreas
Liver

10. 7th STEP
Then, this mixture goes to the small intestine,
where the blood vessels absorb the nutrients.
Small
Intestine

11. 8th
STEP
The circulatory system carries the nutrients to
all parts of our body.
nutrient
s

12. 9th
STEP
Next, the large intestine stores de waste
products that we don’t need and it absorbs
water.
Waste
Products

13. 10th
STEP
Finally, faeces are expeled from the body.

14. THANKS FOR
WATCHING!