Digestive System - Small Intestine

Emma Davidson, Nicole Bergman, Jordan Dubonion, Makayla Scheirer

Pritchard HBSPeriod 1-2March 9, 2015

Relative size of the Small Intestine -

★ About 20 feet long, about an inch in diameter

Location of Small Intestine - ★ Extends from the stomach to the large

intestine

Size and Location

3 Sections and Their Function

★ Duodenum- takes partially digested food from the stomach and is mixed with bile from the liver to complete

the digestion process.★ Jejunum- serves as the primary site for nutrition

absorption.★ Ileum- completes absorption process that was missed in

the jejunum.

★pH within the small intestine is about 6 to 7.4 pH in the terminal

ileum. It is maintained by helping the small intestine

through the digestion process.

What is the pH & how is it maintained?

Where do bile and pancreatic enzymes enter the small intestine?

★Bile and pancreatic enzymes enter the small intestine through

the Papillia of Vater.

★ Peptidases: these digest the smaller pieces of broken down proteins, called peptides, into their

individual amino acids.★ Sucrase: this breaks sucrose, a disaccharide (of

the carbohydrate category) into monosaccharides.★ Maltase: this breaks maltose, a disaccharide (of

the carbohydrate category) into monosaccharides.★ Lactase: this breaks lactose, a disaccharide (of

the carbohydrate category) into monosaccharides.

Enzymes in the Small Intestine

How your food moves

★ The muscularis layer surrounds the submucosa and provides several layers of smooth muscle tissue to

move the intestines

Carta. (n.d.). Retrieved from http://carta.anthropogeny.org/moca/topics/smalllarge-intestine-length-ratioCook biotech. (n.d.). Retrieved from http://www.cookbiotech.com/images/cross_section.jpgGastrodigestive system. (n.d.). Retrieved from http://gastrodigestivesystem.com/digestion/digestion-phHillendale health. (n.d.). Retrieved from http://hes.ucfsd.org/gclaypo/digestive_system.htmlInner body. (n.d.). Retrieved from http://www.innerbody.com/image/dige08.htmlInnerbody. (n.d.). Retrieved from http://www.innerbody.com/image_digeov/dige10-new3.htmlMedlinePlus. (n.d.). Retrieved from http://www.nlm.nih.gov/medlineplus/ency/imagepages/19221.htmMUSC health. (n.d.). Retrieved from http://www.ddc.musc.edu/public/organs/pancreas.htmlNatural reflex cure. (n.d.). Retrieved from http://www.natural-reflux-cure.com/ph-level.htmlNIH. (n.d.). Retrieved from http://www.niddk.nih.gov/health-information/health-topics/Anatomy/your-digestive-system/Pages/anatomy.aspx

Works cited