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The human digestive system
 

The human digestive system

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    The human digestive system The human digestive system Presentation Transcript

    • The Human Digestive System John Lee Pri. 4B
    • The Mouth
      • In mammals, food enters the mouth and is chewed by the teeth into tinier pieces.
      • The enzymes in the saliva break down some of the starch and fat in the food.
    • The Gullet
      • The esophagus is also known as the gullet, is a muscular tube through which food travels to the stomach.
      • The rhythmic muscle movement of the gullet gives us the ability to eat or drink even when we're upside-down!
    • The Stomach
      • The stomach is a large, sack-like organ that breaks down the food and bathes it in a very strong acid.
      • The stomach has a very strong wall lining to withstand the acid and is elastic enough to contain up to 2 litres of food and liquids.
    • The Small Intestine
      • The small intestines measure about 6 metres in length!
      • Its huge surface area absorbs 90% of nutrients and water the body will receive from digested food.
    • The Large Intestine
      • The large intestine absorbs the last bits of nutrients and water from indigestible food.
      • It then compacts the remaining matter and eliminates it as waste (faeces).
    • Recommended Food Intake
      • Here is a chart you can use to help ensure you're meeting key nutrient needs. Nutrient needs are best met by choosing a variety of different foods.
    • References
      • http://en.wikipedia.org/wiki/Stomach
      • http://en.wikipedia.org/wiki/Intestine
      • http://en.wikipedia.org/wiki/Mouth
      • http://en.wikipedia.org/wiki/Gullet