Pritchard HBS
Period 1-2
March 9, 2015
Digestive System Small Intestine
Emma Davidson, Nicole Bergman, Jordan
Dubonion, Makayla Scheirer
Size and Location
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
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.
What is the pH & how is it maintained?
★ 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.
Where do bile and pancreatic enzymes
enter the small intestine?
★ Bile and pancreatic enzymes enter
the small intestine through the
Papillia of Vater.
Enzymes in the Small Intestine
★
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.
How your food moves
★ The muscularis layer surrounds the
submucosa and provides several layers of
smooth muscle tissue to move the intestines
Works cited
Carta. (n.d.). Retrieved from http://carta.anthropogeny.org/moca/topics/smalllarge-intestinelength-ratio
Cook biotech. (n.d.). Retrieved from http://www.cookbiotech.com/images/cross_section.jpg
Gastrodigestive system. (n.d.). Retrieved from
http://gastrodigestivesystem.com/digestion/digestion-ph
Hillendale health. (n.d.). Retrieved from http://hes.ucfsd.org/gclaypo/digestive_system.html
Inner body. (n.d.). Retrieved from http://www.innerbody.com/image/dige08.html
Innerbody. (n.d.). Retrieved from http://www.innerbody.com/image_digeov/dige10-new3.html
MedlinePlus. (n.d.). Retrieved from
http://www.nlm.nih.gov/medlineplus/ency/imagepages/19221.htm
MUSC health. (n.d.). Retrieved from http://www.ddc.musc.edu/public/organs/pancreas.html
Natural reflex cure. (n.d.). Retrieved from http://www.natural-reflux-cure.com/ph-level.html
NIH. (n.d.). Retrieved from http://www.niddk.nih.gov/health-information/healthtopics/Anatomy/your-digestive-system/Pages/anatomy.aspx