ATP: Adenosine triphosphate; a compound that releases energy during the process of cellular respiration Basal Metabolic Rate: the rate at which the body uses energy while at rest to keep vital functions going, such as breathing and keeping warm Calories: a unit used in measuring the amount of energyfoodprovides when eaten and digested: Carbohydrate: a nutrient that provides energy, typically made of sugars or starches Cellular respiration:The chemical process that generates most of the energy in the cell, supplying molecules needed to make the metabolic reactions Circulatory System: the body system that circulates blood through the body, consisting of the heart, blood vessels, and blood Digestive System: a group of organs working together to convert food into energy and basic nutrients to feed the entire body Food pyramid: a nutritional diagram in the shape of a pyramid Glucose: a simple carbohydrate (sugar) that is an important energy source in living organisms and is a component of many carbohydrates Lipids (fat): The body uses fat as a fuel source, and fat is the major storage form of energy in the body. Metabolism: the chemical processes that occur within a living organism in order to maintain life Minerals: a solid inorganic substance of natural occurrence Photosynthesis: the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water Protein: a nutrient that is especially for the growth and repair of body tissue; building blocks