Food11

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Food11

  1. 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 we need to walk or study . - Some food come from animals.
  2. 2. 2 - 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: 1. Grains give us energy. 2. Vegetables give us vitamins.
  3. 3. 3 3. Fruit gives us vitamines. 4. Milk give us calcium to grow and have strong bones. 5.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.
  4. 4. 4 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. We need milk. - If we do a lot of exercise we need to eat more. 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 to start the day. - A good breakfast should have milk, cereals and fruit
  5. 5. 5 THE DIGESTIVE SYSTEM Is made up of the following organs: The mouth, oesophagus, stomach, intestines and anus. Food enters our body through our mouth. Our oesophagus is a tube between our mouth and stomach
  6. 6. 6 - Our stomach is like a bag. - Our intestine is a long tube. - At the end of the large intestine is the anus. THE STAGES OF DIGESTION 1.Digestion begins in the mouth . - Our theeth catch and chew the food. - Our tongue mixes the food with saliva. - Then the food goes down the esophagus and into the stomach.
  7. 7. 7 2. In the stomach food is mixed with a liquid (gastric juice). 3. In the small intestine: - the food is dividided into the sustances our body need. - all the useful parts of food go from our small intestine into the blood.
  8. 8. 8 4. Large intestine Parts we cannot use go into the large intestine. They are transformed into faeces and expelled through the anus. Digestion takes time (about 2 hours) So we need to wait before swimming or running.

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