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  1. 1. 1 FOOD ANDFOOD AND DIGESTIONDIGESTION WE NEED FOOD TO LIVEWE 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.
  2. 2. 2 • Other comes from plants, like fruit and 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.
  3. 3. 3 A HEALTHY DIET.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 heathy, this is a balanced diet. 3. Fruit gives us vitamines to be healthy. 4. Milk gives us calcium to grow and have strong bones. 5. Meat, beans and fish give us proteins to have strong muscles.
  4. 4. 4 HOW MUCH FOOD DO WEHOW MUCH FOOD DO WE NEED?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. We need milk. • If we do a lot of exercise, we need to eat more. FOOD AND MEALS.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.
  5. 5. 5 • A good breakfast provides the nutrients that people need to start the day off right. • A good breakfast should have milk, cereals and fruit. THE DIGESTIVE SYSTEN.THE DIGESTIVE SYSTEN. • The digestive system is made up of the following organs: the mouth, oesophagus, stomach, intestines and anus.
  6. 6. 6 3.3. • Food enters our body through our mouth. • Our oesophagus is a tube between our 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 is the anus.
  7. 7. 7 THE STAGES OF DIGESTIONTHE STAGES OF DIGESTION 1. 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 and estomach. 2. IN THE ESTOMACH2. IN THE ESTOMACH -In the stmach food is mixed with gastric juices.
  8. 8. 8 3.3. - In the small intestine, the food is divided into the subtances our body needs. - All the useful parts of our food go from our small intestine into the blood. 4.4. LargeLarge intestineintestine • Parts we cannot use go into the large intestine. • They are transformed into faeces and expelled through the anus.
  9. 9. 9 • Digestion takes time (2 hours). - We should wait before we swim or run.