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e Biology notes for class 11 - Digestion in the Small Intestine Takshila Learning  is one of the largest growing companies offering Biology, Chemistry, and Physics classes, CBSE guide, last year question papers for board exams preparation. We at Takshila Learning, always do best to keep our students ahead in terms of learning and preparation.  Class 11 Biology :  The length of the small intestine can vary greatly, from as short as 2.75 m (9.0 ft) to as long as 10.49 m. The average length of a living person is 3m-5m. The length depends both on how tall the person is and how the length is measured. Taller people generally have a longer small intestine. The partly digested food (chyme), from the stomach, comes to the duodenum (the first part of the small intestine.) Here it is mixed with the intestinal juice, bile juice produced by the liver and pancreatic juice produced by the pancreas. Composition of Intestinal Juice/ Succus Entericus The intestinal juice produced by