1 / 11

Digestive system

Digestive system. Why do we need to eat? A: To obtain energy What gives us energy? A: The nutrients in food and drinks How do we get those nutrients from food? A: The body evolves the digestive system 4. So what do you think is the function of the digestive system?.

harmon
Download Presentation

Digestive system

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Digestive system Why do we need to eat? A: To obtain energy What gives us energy? A: The nutrients in food and drinks How do we get those nutrients from food? A: The body evolves the digestive system 4. So what do you think is the function of the digestive system?

  2. The adventure of eaten food Recall

  3. Digestive system - Pica http://edition.cnn.com/2004/HEALTH/02/18/coin.eater.ap/index.html

  4. Human digestive system • Mechanical breakdown of food: • incisors: slicing & gripping • canines: ripping & tearing • premolars: bitting & tearing • molars: grinding • Chemical breakdown of food: • saliva

  5. Human digestive system Food  bolus Peristalsis pushes bolus towards the stomach via muscle contraction

  6. Human digestive system Secretes HCl and pepsin to chemically digest the food Digestion takes place in the bowel, bottom of the stomach

  7. Human digestive system

  8. Human digestive system

  9. Human digestive system • Liver secretes bile • bile digest fat

  10. Human digestive system Pancreas secretesproteins to digest protein, and neutralize stomach acid

  11. Digestive system

More Related