Organs and organ systems

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  • Organs and organ systems
    • Tissues make up organs
      • An organ is a group of tissues that work together to perform a certain function
      • The stomach is an organ made of these tissues:
        • Muscular tissue which moves the stomach wall to churn 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 certain function
      • The digestive system is found in humans and other mamals
      • The digestive system breaks down food. It does this by releasing digestive juices
        • Then the digestive system absorbs the products of digestion
    • How organs work in the digestion system
      • SALIVARY GLANDS: produce digestive juices e.g saliva
      • LIVER: Produces bile
      • PANCREAS (a gland) : Produces digestive juices
      • SMALL INTESTINE: Digests food and absorbs soluble food molecules, e.g gluscose
      • LARGE INTESTINE: Absorbs water from undigested food, leaving faeces.


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