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The Digestive System By: Kayla Johnson Jenneil Colstock Fiona Harper


What is the Digestive System?

• The digestive system is a group of organs responsible for the conversion of food into nutrients and energy needed by the body. In humans, the digestive system consists of the mouth, esophagus, stomach, and small and large intestines.


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The digestive system is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. Inside this tube is a lining called the mucosa. In the mouth, stomach, and small intestine, the mucosa contains tiny glands that produce juices to help digest food.


How the digestive system works!


Facts about the Digestive System! • The esophagus of the digestive tract is about 10-14 inch long and 1 inch in diameter. • Every individual produces 16 to 48 ounces saliva per day. • An adult stomach has the capacity to hold around 1.5 liters food material. • About 11 liters of fluid, digestive juices and digested food is circulated in the digestive system, of which only 100 milliliter is excreted as waste product


More Facts about the Digestive System! • All the different varieties of food we eat are broken down by our digestive system and transported to every part of our body by our circulatory system. • The liver is the largest organ in the body. • The small intestine (pronounced in-test-in) is a long tube about 1 and a half to 2 inches around, and about 22 feet long.


Functions of Digestive Organs • Mouth-The mouth is the beginning of the digestive tract. Chewing breaks the food into pieces that are more easily digested. • Esophagus-the esophagus receives food from your mouth when you swallow; the esophagus delivers food to your stomach. • Stomach-holds food while it is being mixed with enzymes that continue the process of breaking down food into a usable form.


Functions of Digestive Organs •

Small intestine- the small intestine is a 22-foot long muscular tube that breaks down food using enzymes released by the pancreas and bile from the liver.

Pancreas-The pancreas secretes digestive enzymes into the duodenum, the first segment of the small intestine

Liver-The liver has multiple functions, but its main function within the digestive system is to process the nutrients absorbed from the small intestine.

Gallbladder-The gallbladder stores and concentrates bile, and then releases it into the duodenum to help absorb and digest fats.


Resources • http://digestive.niddk.nih.gov/ddiseases/pubs/yrd d/http://digestive.niddk.nih.gov/ddiseases/pu bs/yrdd/ • http://kidshealth.org/kid/htbw/digestive_syst em.html • http://www.nexiumresearch.com/digestive_s ystem_facts.html • http://www.buzzle.com/articles/facts-aboutthe-digestive-system.html • http://www.cchs.net/health/healthinfo/docs/1600/1699.asp?index=7041


Digestive System.Kayla Johnson