describe what is happening to the muscles in the wall of the small intestine at position H and I and explain how this causes the food to move.
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The small intestine, despite its name, is the longest part of the gastrointestinal tract. It works with other organs of the digestive system to further digest food after it leaves the stomach and to absorb nutrients. The entire digestive system works together to turn the food you eat into energy.
The small intestine is a long, winding tube connected to the stomach on one end and the large intestine on the other. According to the Medical University of South Carolina (MUSC) Digestive Disease Center, the small intestine is only about as big around as a middle finger (approximately 1 inch or 2.5 centimeters) and is from 20 to 25 feet (6 to 7.6 meters) long in an adult.
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