Discuss the structure and function of small intestine with labelled diagram.

The small intestine is a crucial organ in the digestive system, responsible for the majority of nutrient absorption and digestion. Structurally, it is a long, coiled tube measuring about 6-7 meters in length in adults and consists of three regions: the duodenum, jejunum, and ileum.

1. Duodenum: This initial segment is about 25 cm long and receives partially digested food (chyme) from the stomach, bile from the liver ____ _______ _______ __________ ____ ______ _______ _______ ____ _________ _________.
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