anthropometry: Methods of measuring body fat.

bariatric surgery: Surgery to treat morbid obesity.

body mass index: A commonly used measurement of body weight relative to height used to calculate whether someone is overweight or obese.

calorie: A measure of heat used in dietetics for measuring the heat content of a food, or the amount of energy it can yield as it passes through the body.

carbohydrate: Amajor source of energy in the diet. There are two types of carbohydrates—simple sugars and complex carbohydrates.

chromosomes: Wormlike bodies in the center of each cell where genes reside.

diet: Any type of eating plan.

genes: The part of a DNA molecule that passes hereditary information from parents to their offspring.

ileum: The lower small intestine.

jejunum: The upper small intestine.

morbid obesity: A condition in which being overweight is likely to bring about major medical problems.

obesity: Having more body...