Which parts are included in the respiratory system?

The respiratory system is primarily responsible for the intake of oxygen and expelling carbon dioxide, and its main components include the nose, pharynx, larynx, trachea, bronchi, and lungs. The nose functions as the entry point for air, where it is filtered, warmed, and moistened before moving to the lungs. The lungs, consisting of alveoli where gas exchange occurs, are vital for oxygen absorption into the bloodstream and the removal of carbon dioxide.

In contrast, the heart and blood are part of the circulatory system, which transports oxygen and nutrients to cells throughout the body. The brain and spinal cord belong to the central nervous system, responsible for processing information and controlling bodily functions. The stomach and intestines are components of the digestive system, focused on breaking down food and absorbing nutrients. This context clarifies why the combination of the nose and lungs accurately represents the components of the respiratory system.