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1
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.
2
WE NEED FOOD TO LIVE
- Some food comes from animals, like
milk.
- Others, comes from plants like fruit and
bread.
- We also need water and salt,
that do not come from
plants or animals.
FOOD GROUPS
- We classfity food into five groups.
- Grains gives us energy.
-Vegetables gives us vitamines.
- Fruit gives us vitamines to be healthy.
- Milk gives us calcium to grow and…
- Meat, fish and beans give us proteins…
3
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 a balanced diet.
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 because it has calcium.
- If we do a lot of exercise, we need to eat
more.
4
FOOD AND MEALS
• There are four meals that we eat during
the day: breakfast, lunch, tea and dinner.
This is so we have enough food to give us
energy through the day.
• It is very important to have a good
breakfast.
THE DIGESTIVE SISTEM
- The digestive system is made up the
following organs: the mouth, oesophagus
stomach, intestines and anus.
- Food enters our body through our mouth.
5
THE DIGESTIVE SYSTEM
• Our esophagus is a tube between our
mouth and stomach.
• Our stomach is like a bag.
THE DIGESTIVE SYSTEM
• Our intestine is a long tube.
• At the end of the large intestine is the
anus.
6
THE STAGES OF DIGESTION
1. Digestion begins in the mouth:
- Our teeth cut and chew the food.
- Our tongue mixes the food with salive.
- Then food goes down.
THE STAGES OF DIGESTION
2. In the stomach the food is mixed with a
liquid (gastric juice.)
7
THE STAGES OF DIGESTION
• 3. In the small intestine, the food is divided
into the substances our body needs.
• These substances pass from the intestine
to the blood.
THE STAGES OF DIGESTION
• 4. Parts we cannot use go into the large
intestine. They are transforme into faeces
and expelled through the anus.
• Digestion takes time (2 hours). We should
wait before swim or run.

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Food3

  • 1. 1 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.
  • 2. 2 WE NEED FOOD TO LIVE - Some food comes from animals, like milk. - Others, comes from plants like fruit and bread. - We also need water and salt, that do not come from plants or animals. FOOD GROUPS - We classfity food into five groups. - Grains gives us energy. -Vegetables gives us vitamines. - Fruit gives us vitamines to be healthy. - Milk gives us calcium to grow and… - Meat, fish and beans give us proteins…
  • 3. 3 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 a balanced diet. 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 because it has calcium. - If we do a lot of exercise, we need to eat more.
  • 4. 4 FOOD AND MEALS • There are four meals that we eat during the day: breakfast, lunch, tea and dinner. This is so we have enough food to give us energy through the day. • It is very important to have a good breakfast. THE DIGESTIVE SISTEM - The digestive system is made up the following organs: the mouth, oesophagus stomach, intestines and anus. - Food enters our body through our mouth.
  • 5. 5 THE DIGESTIVE SYSTEM • Our esophagus is a tube between our mouth and stomach. • Our stomach is like a bag. THE DIGESTIVE SYSTEM • Our intestine is a long tube. • At the end of the large intestine is the anus.
  • 6. 6 THE STAGES OF DIGESTION 1. Digestion begins in the mouth: - Our teeth cut and chew the food. - Our tongue mixes the food with salive. - Then food goes down. THE STAGES OF DIGESTION 2. In the stomach the food is mixed with a liquid (gastric juice.)
  • 7. 7 THE STAGES OF DIGESTION • 3. In the small intestine, the food is divided into the substances our body needs. • These substances pass from the intestine to the blood. THE STAGES OF DIGESTION • 4. Parts we cannot use go into the large intestine. They are transforme into faeces and expelled through the anus. • Digestion takes time (2 hours). We should wait before swim or run.