Human Auerbach's Plexus

"You are what you eat" may be true, but the mechanism by which ingested food becomes vital nutrition for the human body depends largely on the digestive system, including the small intestine. This critical organ, a convoluted tube, extends from the pyloric narrowing of the human stomach for about 20 feet in length as it tapers down to join the large intestine. The duodenum, the first of three parts, is the shortest (about 10 inches) and widest segment of the small intestine.