How Absorption Of Food Does Take Place?

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How Absorption Of Food Does Take Place?

2 Answers

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Answer 1

The absorption of food is a complex mechanism. When the food substances have been so altered by the enzymes in the duodenum that they now consist of minute's fragments which can readily be used by the body, they are transported to the next two sections of the small intestine, the jejunum and ileum. It is principally here that usable components are taken up by the body. They are absorbed. Absorptions in these sections of the small intestine proceeds rather like sorting out specific parts from a conveyor belt. Individual substances are selected along the entire length of the small intestine and transported through the wall of the circulatory system.

Naturally, if the absorption through the wall of the small intestine into the bloodstream is disturbed, the whole digestive system soon ceases to function. This has repercussions on the stomach and the affected person suffers from gastrointestinal discomforts.
No one will now be surprised to learn that enzyme plays a decisive role in the absorption in the building components from the intestinal track to the circulatory system. Furthermore, numerous enzymes are essential as transports for useful substances that the body needs.

Answer 2

Absorption of food in the small intestine; in the ileum the completely digested food is ready to be absorbed. The small intestine is just about twenty two feet long. Its internal layer is thrown into thousands of finger like projections called villi. They have numerous blood capillaries and a lymph vessel called lacteal in each villus. The glucose, amino acids, glycerol and fatty acids of the digested food diffuse through the lining of small intestine into the blood stream and lacteal; this whole process is known as the process of absorption.

All carbohydrates are absorbed in the form of glucose, fructose, and glactose. Proteins are absorbed in the form of amino acids. The small molecules of the digested food, principally amino acids and glucose pass through the epithelium of the capillary walls and enter the blood plasma.

Some of the fatty acids and glycerol from the digestion of fats do not enter the blood capillaries of the villi, instead they enter and recombine in the intestinal lining to form fats again, and then these fats pass into the lacteal. The fluid in the lacteal enters the lymphatic system and eventually empties its contents into the blood stream through the thoracic acid.