Final answer:
Bariatric surgery is a type of surgery that modifies the gastrointestinal system to help the extremely obese lose weight. It involves limiting food intake and nutrient absorption, resulting in weight loss.
Step-by-step explanation:
Bariatric surgery is a type of surgery that helps the extremely obese lose weight. It involves modifying the gastrointestinal system to reduce the amount of food that can be eaten and/or limiting how much of the digested food can be absorbed. There are several different types of bariatric surgeries, including stomach stapling, lap band, and gastric sleeve. Each type of surgery modifies the stomach in different ways to limit food intake and nutrient absorption, resulting in weight loss.