What term is used to describe groups of organs that work together to perform one or more functions in the body?

The term that describes groups of organs working together to perform one or more functions in the body is "body systems." Body systems are made up of different organs that cooperate to carry out specific tasks essential for the body’s overall health and maintenance. For example, the digestive system includes organs such as the stomach, intestines, and liver that all contribute to the process of digestion and nutrient absorption.

Understanding body systems is crucial in cosmetology, as the condition of skin, hair, and nails often reflects the health of the underlying systems in the body. This knowledge helps cosmetologists provide better care and suggest appropriate treatments for their clients.

Other terms like "body parts," "body cells," and "body structures" do not convey the organized, functional collaboration of multiple organs that the term "body systems" does. While these other terms refer more to individual components of the body—such as single organs, cells, or structural elements—they do not imply the collective operation required to support life functions like the body systems do.