Small intestine: It is called small intestine as the diameter is small in the region here. It is the longest part of the alimentary canal. It is distinguished into three areas:
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(i) Duodenum (U-shaped): 25 cm long segment forms the main digestive area of the alimentary canal. Bile duct and pancreatic duct opens here. Pyloric sphincter regulates the opening of the stomach into the duodenum.
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(ii) Jejunum (long and coiled middle portion): It is 2.5 m long and forms the intestine's middle part. It is responsible for digestion of carbohydrates, lipids, proteins, nucleic acids, and absorption starts.
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(iii) Ileum (highly coiled, most extended portion): Longest part of the alimentary canal (3.5 m long). It contains a large number of villi (microvilli) which helps in the absorption of food. Ileum, the last part of the small intestine leads into the large intestine.
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Acidification of ingested food happens in the stomach due to secretion from oxyntic cells or parietal cells, i,e. HCl.
\n"},"encodingFormat":"text/html","position":3,"text":"Acidification of ingested food"},"comment":{"@type":"Comment","text":"Chyme formation occurs in stomach."},"eduQuestionType":"Multiple choice","encodingFormat":"text/markdown","learningResourceType":"Practice problem","suggestedAnswer":[{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":0,"text":"Absorption of end products of digestion"},{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":1,"text":"Digestion of proteins"},{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":2,"text":"Digestion of lipids"}],"text":"Which ONE of the following is NOT a function of the small intestine?"},"name":"Quiz on Digestion and Absorption","typicalAgeRange":"10-17","url":"https://www.embibe.com/questions/Which-ONE-of-the-following-is-NOT-a-function-of-the-small-intestine%3F/EM7193833"}
In a T. S. of the human small intestine, serosa is the outermost layer and is made up of a thin __A__. Muscularis is formed by the smooth muscles arranged outer __B__ and inner __C__. Sub-mucosa is formed by the __D__. Mucosa is the innermost layer made of __E__.
A baby boy aged two years is admitted to playing school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?