Food and digestion - grade 4

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Food and digestion - grade 4

  1. 1. PREPARED BY– NITI KANOONGO IV B CHOITHRAM INTERNATIONAL SCHOOL
  2. 2.  We need food to grow , be healthy and have energy. The food we eat is broken down in our digestive system. The chemicals from the food are transported around the body by the bloodstream. The chemicals that make up our food can be grouped into seven types. A balanced diet contains the right amount of all seven types.
  3. 3.  Magazines and newspapers are full of diets. Some diets are sensible , others could be dangerous. Most people think that the easiest way to lose weight is to go on a diet. This is not always the best way to do it. Scientists have shown that nine times out of ten , weight lost during dieting is put back on at a later date.
  4. 4.  It can take 24 hours for the food to pass through your body. On its journey it is broken down. Useful chemicals are absorbed into the blood around the body. Anything that we eat that our body doesn’t need right away is either stored or excreted as waste.
  5. 5.  What happens when we eat food???  STAGE 1- First we break up food by chewing it.  STAGE 2- Then we swallow our food and it passes down the esophagus or gullet.  STAGE 3- The food is now in the stomach.  STAGE 4- In the small intestine , bile from the liver stops that fat clumping together.  STAGE 5- When it reaches the large intestine all the useful parts of the food have been absorbed.
  6. 6.  A balanced diet means that we should eat the same amount of food. These are some of the things which we should eat in a balanced diet: o Bread o Potatoes o Rice o Pasta o Meat o Fish o Oils o Butter o Cheese o Salt o Yeast o And more….

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