The small intestine is continuous with the stomach at the pyloric sphincter and has a length of 16-19 feet (5-6 meters). It leads into the large intestine, which is about 3.5-5 feet (1-1.5 meters) long. The small intestine secretes intestinal juice to complete digestion of carbohydrates, protein and fats. It also absorbs nutrient materials necessary for nourishing and maintaining the body, and protects it against infection by microbes that have survived the anti-microbial action of hydrochloric […]