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Digestive System Process Grid Students will understand the digestive system works to make food usable for cell and works with the circulatory system. http://kidshealth.org/kid/htbw/heart.html# System Parts Specific Functions Interdependency (How they work and what they do.) (RELATIONSHIP TO OTHER SYSTEMS) mechanical digestion – chop, grind, chew Mouth teeth tongue INTERESTING FACTS blood vessels in the mouth Food stays in mouth about 2 minutes blood vessels in the esophagus peristalsis is responsible for the rumbling sounds in digestive tract food stays here from 4-8 seconds; 1-2 seconds for soft food stomach protected from HCl by mucus layer food stays in stomach about 4 hours becomes thick liquid chemical digestion – Esophagus connected to mouth muscles push food down peristalsis Stomach saliva - enzyme chemical breakdown enzymes hydrochloric acid blood vessels in stomach Pictures Small Intestine Large Intestine breakdown process finished here blood vessels in small intestine thick stomach liquid mixed with bile and other enzymes nutrients pass into blood stream Last 20 ft. passes through walls into blood water parts of food not digested most water absorbed into blood through intestine walls produces bile to break up (chemical) fats in food Bile stored in gall bladder produces enzymes used in small intestine stores bile made in liver ejects bile into small intestine produces saliva for chemical breakdown helps in chewing , swallowing, & chemical breakdown takes ~ 12 hours for food to pass through Leftover waste, urine and feces, go bye-bye You can live without gall bladder Additional Organs Liver Pancreas Gall Bladder Salivary Glands