Organs and Organ Systems

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  • Organs and Organ Systems
    • Tissues Make Up Organs
      • An ORGAN is a group of DIFFERENT TISSUES that work together to perform a certain FUNTION.
      • The STOMACH is an organ made of these tissues:
        • Muscular Tissue, which moves the stomach wall to churn (mix) up the food.
        • Glandular tissue, which makes digestive juices to digest food.
        • Epithelial Tissue, which covers the outside and inside of the stomach.
    • Organs Make Up Organ Systems
      • An organ system is a group of organs working together to perform a particular function.
      • The digestion system is found in humans and other mammals.
        • The digestive system breaks down food. It does this by releasing digestive juices.
          • Then the digestive system absorbs (takes in) the products of digestion.
      • The Digestive System
        • You need to know where all these organs are in the digestive system:
          • Salivary Glandsproduces digestive juices e.g. saliva.
          • Labelled Diagram for each different parts of the digestive system can be found on bbcbitesize, additional science, Biology.
          • Liver produces bile.
          • Stomach digests food.
          • Pancreas (a gland) produces digestive juices.
          • Large intestine absorbs water from undigested food, leaving faeces.
          • Small intestine 1) Digests food 2) Absorbs soluble food molecules, e.g. glucose.

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