What structures are included in the respiratory system?

The correct answer identifies the key components of the respiratory system, which are primarily responsible for the intake of air and the exchange of gases. The nose serves as the entry point for air, filtering and humidifying it before it enters the respiratory tract. The nasal cavity continues this function, providing an extended area for filtration and warming of incoming air.

The pharynx acts as a passageway for both air and food, directing air into the larynx, which houses the vocal cords and is critical for sound production. This set of structures forms the upper part of the respiratory system, facilitating the initial stages of respiration.

Understanding the structures involved is important for comprehending how the respiratory system functions as a whole, enabling airflow and gas exchange necessary for sustaining life. Each structure performs a vital role in preparing air for the lungs, where further gas exchange occurs.