sentence2_structure: chemical digestion<>mainly takes<>place<>in the small intestine<>In the body
sentence1: Just as food leaves the stomach into the small intestine, there is an organ that is attached to and parallel to the main digestive tract called the pancreas.
sentence2: In the body, chemical digestion mainly takes place in the small intestine.
question: In the body, in which organ does chemical digestion mainly take place?