Natural Science

2. Funtion of the digestive system
Nutriens are the
subtances which plants
and animals need in
order to live and grow.
The digestive system is
the group of organs in
the body that extract
nutrients from food and
expel undigested waste.

3. Digestion
1º Our sense of smell triggers the
production of saliva in our mouth.
This helps the teeth to crush food.
2º The tongue shapes de food into a ball
called a bollus and it is send to the
oesophagus. Then it is sent to the
stomach.
3º The role of the stomach is to breack
down food. It does this by using its
strong muscular walls and excreting
gastric juices.
4º Once the food is disolved into a liquid,
it passes into the small intestine.
5º The waste that our body does not need
passes to the large intestine. The
soild waste leaves our body through
the anus.