The small intestine's major function is to absorb food and nutrients. When food enters the stomach, acid begins to break it down, and some nutrients are absorbed in the stomach. Then the food passes into the small intestine, where enzymes and sodium bicarbonate flow in from the pancreas to neutralize any remaining stomach acid and break down the remaining nutrients. The large intestine absorbs water and creates fecal matter.Know More
The small intestine also plays a role in the body's immune system. Probiotic gut flora not only aid in the digestion of troublesome compounds, they also increase the body's immune response.
When food enters the small intestine, the body handles each type of molecule differently. Lipids break down into fatty acids and glycerol, while proteins break down into amino acids and peptides for easy absorption into the body. Carbohydrates may break down into simple sugars, but complex carbohydrate molecules may pass through the small intestine relatively intact. Once they reach the large intestine, bacteria break them down and produce intestinal gas as a by-product. This is why foods high in complex carbohydrates, such as beans, can cause intestinal discomfort. To combat this effect, special enzymes break down the complex carbohydrates before the bacteria have a chance to consume them, preventing the release of gas.Learn more about Organs
The pH in the small intestine increases from pH 6 in the duodenum to pH 7.4 at the distal end of the small intestine in the terminal ileum. The pH decreases to pH 5.7 in the cecum but increases to pH 6.7 in the rectum.Full Answer >
The small intestine's job is to absorb about 90 percent of the nutrients we consume, according to InnerBody. The small intestine is about an inch wide and approximately 10 feet long and is folded along itself in the abdominal cavity. It is twice the length of the large intestine.Full Answer >
The small intestine is a part of the human body's digestive system, coming after the stomach and before the large intestine in the sequence of food digestion. At 5 meters long, it is also the longest organ in the digestive system, though it is significantly narrower than the large intestine.Full Answer >
According to MedlinePlus, people are capable of living without their small intestines, although difficulties with digestion can occur after the removal. A surgery known as a small bowel or small intestine resection involves the removal of either a portion of or the entirety of the small intestine.Full Answer >