Small IntestineSmall IntestineMost chemical digestion takes Most chemical digestion takes place hereplace here
Absorb nutrientsAbsorb nutrients
Other organs assistOther organs assist
11stst part of the SI is the duodenum part of the SI is the duodenum
Small IntestineSmall Intestine
VilliVilli – tiny fingerlike structures – tiny fingerlike structures cover the inner surface of small cover the inner surface of small intestine; absorbs nutrients into intestine; absorbs nutrients into the blood and carry through the the blood and carry through the bodybody
3 organs assist:3 organs assist:(these substances go to the duodenum)(these substances go to the duodenum)
1.1. LiverLiver
-produces bile-produces bile
2.2. Gall bladderGall bladder
-stores bile-stores bile
-sends bile to the SI-sends bile to the SI
-bile breaks down fat droplets-bile breaks down fat droplets
3.3. PancreasPancreas
-produces pancreatic juice & sends to the SI-produces pancreatic juice & sends to the SI
-has enzymes for starch and protein-has enzymes for starch and protein
-begins chemical digestion of fat-begins chemical digestion of fat
http://www.medicaldoctorratings.com/41-16-Duodenum-L%5B1%5D.gifhttp://www.medicaldoctorratings.com/41-16-Duodenum-L%5B1%5D.gif
The small intestineThe small intestineThe small intestine has 3 enzymes to The small intestine has 3 enzymes to complete digestion:complete digestion: AmylaseAmylase breaks breaks starchstarch down into down into
glucoseglucose.. ProteaseProtease breaks breaks proteinprotein down into down into amino amino
acidsacids.. LipaseLipase breaks fats down into breaks fats down into fatty acidsfatty acids
and and glycerolglycerol
Small Intestine has a large surface Small Intestine has a large surface area (increases absorption)area (increases absorption)
The tube is over 6 meters longThe tube is over 6 meters long
The inner wall of the tube has bends in itThe inner wall of the tube has bends in it
The wall is covered in villi (small finger-The wall is covered in villi (small finger-like structures)like structures)
Outer wall
Inner wall
Pathway for Food