1. Food provides our bodies with the substances needed for growth, health, and energy. We obtain food from both animal sources like meat and milk, and plant sources like fruits and vegetables.
2. Food is classified into five groups - grains, vegetables, fruits, milk, and meat/fish/beans - which provide us with energy, vitamins, minerals, calcium, and proteins respectively. A balanced diet incorporates foods from all groups.
3. The amount of food needed depends on age and activity level. The digestive system breaks down food through a multi-step process involving the mouth, esophagus, stomach, and intestines to extract nutrients for the body and eliminate waste.
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Food and digestion
WE NEED FOOD TO LIVE
• Food gives us the substances we need to
grow and to stay healthy.
• We get energy to walk or study.
• Some food comes from animals, like meat
and milk.
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• Others, come from plants like fruit and
bread.
• We also need water and salt that do not
come from plants or animals.
FOOD GROUPS
• We classify food into five groups:
• Grains give us energy.
• Vegetables give us vitamines.
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- Fruit gives us vitamines to be healthy.
- Milk gives us calcium to grow and have
strong bones.
- Meat, fish and beans give us proteins to
have strong muscles.
A HEALTHY DIET
- Our diet is made up of the things that we
eat and drink.
- We need to eat food from all the groups to
stay healthy, this is a balanced diet.
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HOW MUCH FOOD DO WE
NEED?
-The quantity of food we need depends on
how old we are and how much physical
exercise we do.
-When we are growing we need more of
some types of food. For example, we need
milk.
- If we do a lot of exercise, we need to eat
more.
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FOOD AND MEALS
-There are four meals that we eat during the
day: breakfast, lunch, tea and dinner.
- It is very important to have a good
breakfast.
- A good breakfast provides the nutrients
that people need to start their day off
right.
- A good breakfast should have milk,
cereals and fruit.
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THE DIGESTIVE SYSTEM
-The digestive system is made up of the
following organs:
the mouth, oesophagus, stomach,
intestines and anus.
THE DIGESTIVE SISTEM
- Food enters our body through our mouth.
- Our oesophagus is a tube between our
mouth and stomach.
- Our stomach is like a bag.
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- Our intestine is a long tube. It is made up
of small intestine and large intestine.
- At the end of the large intestine is the
anus.
THE STAGES OF DIGESTION
- Digestion begins in the mouth.
- Our teeth cut and chew the food.
- Our tongue mixes the food with saliva.
-Then food goes down the oesophagus.
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-In the stomach food is mixed with gastric
juices.
-In the small intestine, the food is divided
Into the substances our body needs.
-All the useful parts of our food go from our
small intestine into the blood.
- Parts we can not use go into the large
intestine.
- They are transformed into faeces and
expelled though the anus.
