Food9
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1 FOOD AND FOOD AND DIGESTION DIGESTION WE NEED FOOD TO LIVE 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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Transcript of Food9
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FOOD AND FOOD AND
DIGESTIONDIGESTION
WE NEED FOOD TO LIVE WE NEED FOOD TO LIVE
• Food gives us the substances weneed to grow and to stay healthy.
• We get energy to walk or study.
• Some food comes from animals likemeat and milk.
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• Other comes from plants, like fruitand bread.
• We also need water and salt ,that do not come from plants or animals.
FOOD GROUPSFOOD GROUPS
• We classify food into five groups:
1. Grains give us energy.
2. Vegetables give us vitamines.
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A HEALTHY DIET.A HEALTHY DIET.
• Our diet is made up of the thingsthat we eat and drink.
• We need to eat food from all the groups to stay heathy, this is a balanced diet.
3. Fruit gives us vitamines to be healthy.
4. Milk gives us calcium to grow andhave strong bones.
5. Meat, beans and fish give usproteins to have strong muscles.
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HOW MUCH FOOD DO WE HOW MUCH FOOD DO WE NEED?NEED?
• The quantity of food we needdepends on how old we are and how much physical exercise we do.
• When we are growing we need more of some types of food. We need milk.
• If we do a lot of exercise, we need toeat more.
FOOD AND MEALS.FOOD AND MEALS.
–There are four meals that we eatduring the day: breakfast, lunchtea and dinner.
–It is very important to have a good breakfast.
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• A good breakfast provides the nutrients that people need to startthe day off right.
• A good breakfast should have milk, cereals and fruit.
THE DIGESTIVE SYSTEN.THE DIGESTIVE SYSTEN.
• The digestive system is made up ofthe following organs: the mouth, oesophagus, stomach, intestines andanus.
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3.3.
• Food enters our body through ourmouth.
• Our oesophagus is a tube betweenour mouth and stomach.
• Our stomach is like a bag.
• Our intestine is a long tube, made up of small intestine and large intestine.
• At the end of the large intestine isthe anus.
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THE STAGES OF DIGESTION THE STAGES OF DIGESTION
1. Digestion begins in the mouth.
- Our teeth cut and chew the food.
- Our tongue mixes the food withsaliva.
- Then food goes down the oesophagus and estomach.
2. IN THE ESTOMACH2. IN THE ESTOMACH
-In the stmach food is mixed withgastric juices.
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3.3.- In the small intestine, the food isdivided into the subtances our bodyneeds.
- All the useful parts of our food gofrom our small intestine into the blood.
4. 4. LargeLarge intestineintestine• Parts we cannot use go into the largeintestine.
• They are transformed into faeces andexpelled through the anus.
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• Digestion takes time (2 hours).
- We should wait before we swim orrun.
