9
Nutrition
2
UNIT
1
Complete the text with these words:
Digestion
When we eat food, it passes first through the mouth. In the mouth, our
crush it and
mix it with a liquid called
. These crushed pieces of food travel through the esophagus
and into the
. There they mix with liquids called
.
These liquids help break down the food. In the small intestine, the food mixes with
from the liver. Then the food passes into the
where it becomes faeces.
Finally, the faeces are expelled from the body.
2
Match the parts of the digestive system to their functions.
3
Write the titles of the three stages of digestion. Then order the stages.
gastric juices
●
teeth
●
bile
●
stomach
●
large intestine
●
saliva
1.
Mouth
a)
It produces bile, which helps break down food.
2.
Esophagus
b)
Here gastric juices begin to break the food down.
3.
Stomach
c)
Here the food is crushed and mixed with saliva.
4.
Liver
d)
Here the faeces are formed from the remains of the food.
5.
Small intestine
e)
Here nutrients are absorbed and pass into the blood.
6.
Large intestine
f)
The faeces pass through this part before leaving the body.
7.
Rectum
g)
Here the food travels to the stomach.
Undigested food is
transformed into faeces.
Food is crushed and
broken down in the mouth
and the stomach.
Nutrients are absorbed
in the small intestine and
pass into the blood.
