Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
DIGESTION in SMALL INTESTINE INTESTINAL DIGESTION 3 juices help digestion in the duodenum of small intestine : 1) BILE JUICE : secreted from the liver , contains dissolved bile salts which emulsified fats i.e dividing large masses of fats into small globules to increase its surface area for the enzymatic action . 2) PANCREATIC JUICE : includes a. Sodium bicarbonate neutralize HCl , keeping the medium alkaline PH 8 to activate digestive enzymes b. Pancreatic Amylase LIVER and PANCREAS Glycogen and Starch + water ........ Pancreatic Amylase ...... Maltose ( Disaccharide ) c. Trypsinogen the inactive trypsinogen ...... Co enzyme Enterokinase ....... active trypsin Protein + Water ......... Trypsin ........ Polypeptides ( Peptones ) d. Lipase Emulsified fats ............ Lipase .......... Fatty acids + Glycerol 3) INTESTINAL JUICE : complete the action of previous enzymes and end digestion : a. Peptidases : number of enzymes Polypeptides ............ Peptidases ............ Amino acids b. Maltose sugar .......... Maltase enzyme .......... 2 molecules of glucose Sucrose ( cane sugar ) ....... Sucrase enzyme ( invertase ) ...... Glucose + Fructose Lactose ( milk sugar ) ........ Lactase enzyme ......... Glucose + Galactose c. Enterokinase , not digestive enzyme but acts as Co enzyme which activates the inactive trypsinogen enzyme to the active trypsin . ABSORPTION is the transfer of the digested food to the blood and lymph through the epithelial cells , the Mucosa of the ileum , by membranal diffusion and active transport . Villi are folds and convolutions forming tiny finger like projections in the inner epithelial lining of the ileum , increasing surface area to absorb food , 10 meters square = 5 times as surface area of the body . Structure of a Villus : Outer covering of single epithelial cells , encloses lacteal vessel surrounded by network of arterial and venous blood capillaries extend from submucosal layer . Some Microvilli ( tiny projections ) come from epithelial cells of villi increasing absorbing surface . Structure of Villi