What is the body system that includes the lungs and air passages?

The body system that includes the lungs and air passages is the respiratory system. This system is responsible for the intake of oxygen and the expulsion of carbon dioxide, which is essential for the process of respiration. The main components of the respiratory system include the lungs, which are the primary organ for gas exchange, as well as the trachea and bronchi, which serve as air passages that facilitate the movement of air in and out of the lungs.

Understanding this system is crucial for various fields, including nail technology, as practitioners may encounter clients with respiratory sensitivities or conditions that could be aggravated by certain chemicals or products used during nail treatments. Hence, knowledge of the respiratory system helps in maintaining a safe and healthy environment during chemical exposures.

The other systems listed—like the circulatory, digestive, and nervous systems—each have distinct functions and components that do not pertain to breathing or the lungs. For instance, the circulatory system focuses on the heart and blood vessels, the digestive system handles food intake and nutrient absorption, while the nervous system is involved in signaling and processing information within the body.