Sections: Prologue | Before Lewis & Clark | Lewis & Clark | After Lewis & Clark When Thomas Jefferson sent Lewis and Clark into the West, he patterned their mission on the methods of Enlightenment science: to observe, collect, document, and classify.
Partially digested food, or chyme, from the stomach is mixed with bile from the liver and pancreatic juice from the pancreas to complete its digestion in the duodenum. The jejunum is the middle section of the small intestine that serves as the primary site of nutrient absorption. It measures around 3 feet in length. The ileum is the final section of the small intestine that empties into the large intestine via the ileocecal sphincter.
It is divided into two major sections: small intestine and large intestine. The small intestine is about 6 meters (20 feet) long. It is coiled in the center of the abdominal cavity (see picture). The small intestine is divided into 3 sections: upper, jejunum, and ileum. The large intestine has a larger width but is only 1.5 meters (5 feet) long. The large intestine is divided into 6 parts: cecum, ascending colon, transverse colon, descending colon, sigmoid colon, and rectum. Source(s): somewhere on yahoo answers.