Digestive System
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Intro to The Digestive System:
Your digestive system is the system that... Digests food physically and chemically ,
Transports food,
Absorbs nutrients, and Eliminates wastes.


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Major Organs:
Pharynx Esophagus Stomach Liver Intestine
Gallbladder
Mouth




Welcome to the wonderful and exciting world of the DIGESTIVE SYSTEM !

  • Keep a look out for bullet points, that's a fun fact. :D

When you eat food, digestion sets in at once.
Your mouth is where the process begins, chewing combined with saliva starts breaking down the food so it can be easily swallowed.

  • We make 1 to 3 pints of saliva a day.
  • The epiglottis is what keeps food from entering your larynx when you swallow!
The chewed food is pushed down the esophagus, to the stomach.
  • Muscles contract in waves to move the food down the esophagus. This means that food would get to a person's stomach, even if they were standing on their head.
Food enters the stomach through the cardiac orifice where it is further broken apart and mixed with gastric acid, pepsin and other digestive enzymes.

  • The stomach's wall is lined with three layers of powerful muscles.
  • For every 2 weeks, the human stomach produces a new layer of mucous lining, otherwise the stomach will digest itself.
  • The liver produces bile, which is a major player in lipid (carb) digestion.

    After being processed in the stomach, food is passed to the small intestine.

    Three liquids in the small intestine for further breakdown:
Bile: which emulsifies fats to allow absorption, neutralizes the chyme.
Pancreatic juice: made by the pancreas.
Intestinal enzymes: like maltase, lactase, sucrase, trypsin and chymotrypsin.
Once the food has passed through the small intestine, it enters the large intestine.

  • The large intestine is roughly 1.5 meters long, with three parts.
The cecum (at the junction with the small intestine)
The colon
The rectum
Finally, once food is fully broken down, it is stored in the rectum, then passed through to the anus and excreted as feces.


Thank you for joining us in our tour of the digestive system, if you have any questions, we will happily answer to the best of our abilities. :)
- Lacey, Kayla, and Brianne.



External Links & References:
http://kidshealth.org/kid/htbw/htbw_main_page.html
http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd/
http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd/
http://www.enchantedlearning.com/subjects/anatomy/digestive/
http://en.wikipedia.org/wiki/Gastrointestinal_tract