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Assimilation vs. Absorption A fight to the death? I think not! By: Jsiggs, Zobro, Pickles, and Calamander Zee Chuman Bodeee Location location location! (Of absorption) a 300m squared surface area the lumen of the small intestine breaks polypeptides (once proteins) into amino acids, and fat globules (insoluble in water) into fatty acids and glycerides. The epithelium of the small intestine (brush border) also breaks poly peptides into amino acids, and tiruns disaccharides of carbohydrates into monosaccharides. Location of assimilation-nation The food that is digested is absorbed into the blood and lymphatic systems (returns proteins and cells to the blood). The digested food in the blood stream reaches the liver. Here, the excess glucose is stored as glycogen to be used in times of need. The cells take the glucose they need from the blood directly for respiration. The amino acids are used to form new proteins. How are these silly systems structured? (Absorption) What about assimilation?? Occurs in the liver Liver cells contain Ribosomes Lysosomes Mitochondria What is the point to this MADNESS? The whole point of absorption and assimilation is to get cells all around the body the nutrients that have been ingested. Absorption of nutrients and compounds into the small intestine allows certain molecules to be transferred directly to the blood, or to be sent to the liver for further breakdown. Once this has occurred, cells such as the heart or skin still haven't received the nutrients or proteins that they need. This is where assimilation comes in. Nutrients and compounds travel through the bloodstream from the small intestine and the liver. They are then given to each cell in the body along with oxygen, allowing all cells to continue to function with the compounds they need.