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DIGESTIVE SYSTEM.pptx

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DIGESTIVE SYSTEM.pptx

  1. 1. DIGESTIVE SYSTEM
  2. 2. What is Digestive System? ● digestive system is breakdown of large, complex organic molecules into smaller components that can be used by the body.
  3. 3. Mouth ● Mouth ingests food ● Teeth masticates food into small pieces to increase surface area for digestion.
  4. 4. Esophagus ● Moves foof fron the throat to the stomachusing muscle movement called paristalsis. If acid stomach gets in here that’s heart burn.
  5. 5. An organ that is part of the digestive system. The stomach helps digest food by mixing it with digestive juices and churning it into a thin liquid. STOMACH
  6. 6. WHAT HAPPENS DURING BREATHING AND SWALLOWING?
  7. 7. ● This automatically induces violent coughing to force the food particles or water and out to prevent choking.
  8. 8. Small Intestine ● are roughly 7 meters long lining of intestine walls has finger like villi, to increase surface area. ● the villi are covered in microvilli wich further increases surface area for absorption. Small intestine
  9. 9. ● The majority of chemical digestion occurs in the first of three sections of the small intestine known as the doudenum. ● The middle part of the small intestine. It is between the duodenum
  10. 10. Large Intestine ● About 5 feet long accepts what small intestines don't absorb rectum (short term storage which holds feces before it is expelled).
  11. 11. Anus ● Anus is the external opening of the rectum. Its closure is controlled by sphincter muscles. Feces are expelled from the body through the anus during the act if defecation, the primary function of the anus.
  12. 12. Conclusion ● The digestive sysytem starts working as soon as the food touches the lips and is ingested. The various organs work together to run this machinery. ● The nerves and hormones control the actions of the internal organs.
  13. 13. ><THE END><
  14. 14. THANK YOU AND GOD BLESS <3

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