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Introduction to the digestive system


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Introduction to the digestive system

  1. 1. Introduction to the Digestive System 7SCIENCE Thurs. Nov. 11
  2. 2. Why study the digestive system? • To keep our bodies alive we need to eat food everyday! • The digestive system is a collection of organs that allows your body to break down food and be used by cells
  3. 3. What organs are involved? • Mouth • Esophagus • Stomach • Small intestine • Large intestine • Rectum • Anus
  4. 4. Organs of the digestive system • Mouth contains tongue and teeth that start to break down food • Esophagus is a muscular tube in which food passes to get to your stomach – Moves food along in a process called peristalsis • Stomach – Described as a muscular bag
  5. 5. Organs of the digestive system continued… • Small intestine gets its name from its small diameter – Most digestion takes place here, through the villi (inner folds of small intestine) – All nutrients from food are absorbed here
  6. 6. Organs of the digestive system continued… • Large intestine has the job of absorbing water and returning it to the body – Solid waste is left • Rectum is where this solid waste is stored until it is ready to leave the body through the anus