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.
Large Intestine. The large intestine starts from the cecum and the ileocecal valve, which serves as the junction between the small and large intestines. The areas of the large intestine that need to be identified are the cecum, spiral colon, ileocecal valve, tranverse, descending, and sigmoid colon, and the rectum.he below picture shows mostly the transverse colon section of the large intestine (where red arrow points to). in the pigs, the transverse colon is very short, and exists to connect the spiral colon to the decending colon, which is shown by the blue arrow.