The stomach is a muscular sac that is important for absorbing food and preparing food for further digestion.
Gastric bypass is a surgical procedure that is done to help obese people lose weight by changing the way stomach and small intestine handles the ingested food. The procedure is done under general anesthesia. The surgery is done in two steps. During the first step, the stomach is divided into two sections, a small upper section (also referred to as a pouch) and a large lower section, using staples. The pouch?s size is similar to the size of a walnut and it can hold only approximately one to two ounces of food. During the second step (also referred to as bypass), a small part of the small intestine or jejunum is connected to a small hole made in the pouch. The food ingested will now travel from the pouch to the small intestine through this new opening. The lower section of the stomach becomes redundant, thereby, allowing the absorption of fewer calories into the body.