What term encompasses the fat and non-fat components of the human body?

The term that encompasses both the fat and non-fat components of the human body is body composition. This concept is crucial as it provides a more detailed understanding of an individual's physical health than weight alone. Body composition considers the proportions of fat mass (which includes essential fat and storage fat) and lean mass (which consists of bone, muscle, organs, and water).

By evaluating body composition, fitness professionals can assess not just the quantity of body weight but also the quality and distribution of that weight, which is important for understanding health risks and creating effective fitness programs. In contrast, body density relates specifically to the mass of the body in relation to its volume, while body mass index (BMI) is a numerical value calculated from height and weight, providing a basic categorization of weight status. Lean mass refers exclusively to the non-fat components of the body, excluding fat entirely, and does not provide the comprehensive overview that body composition does.