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.
The small intestine is the principal site of foodstuff digestion and nutrient absorption along the alimentary canal. It is a relatively long, tubular organ (approximately 6 meters in length) that receives chyme from the stomach through the pyloric outlet and delivers its waste into the cecum of the large intestine.It occupies most of the peritoneal cavity caudal to the stomach.The small intestine is subdivided into three regions. From the proximal to distal ends of the small intestine, these are 1) the duodenum, which is about 25 cm long, 2) the jejunum, which is about 2.5 m long, and 3) the ileum, about 3.5 m long.t is a relatively long, tubular organ (approximately 6 meters in length) that receives chyme from the stomach through the pyloric outlet and delivers its waste into the cecum of the large intestine. It occupies most of the peritoneal cavity caudal to the stomach. The small intestine is subdivided into three regions.