digestive system irene, paula b. and sanaya

DIGESTIVE SYSTEM.

BY SANAYA, PAULA AND IRENE.

WHAT DOES IT DO?

It extracts the nutrients from the food.

NUTRIENTS

WHAT DOES IT DO?

It expels the waste products that our body doesn’t need.

1st STEP

In the mouth, the teeth chew the food. The salivary glands produce saliva and saliva mixes with food and makes a bolus.

2nd STEP

Then, the bolus goes to a small tube called oesophagus.

OESOPHAGUS

3rd STEP

Next, the bolus reaches the stomach.

4th STEP

After that, the gastric juices break down the bolus and transform it into a thick liquid.

5th STEP

The gastric juices also kill dangerous bacteria.

6th STEP

The bile produced by the liver and the pantreatic juices produced by the pancreas are mixed with the thick liquid.

Pancreas

Liver

7th STEP

Then, this mixture goes to the small intestine, where the blood vessels absorb the nutrients.

Small Intestine

8th STEP

The circulatory system carries the nutrients to all parts of our body.

nutrients

9th STEP

Next, the large intestine stores de waste products that we don’t need and it absorbs water.

Waste Products

10th STEP

Finally, faeces are expeled from the body.

THANKS FOR WATCHING!