What does the respiratory system consist of?

The respiratory system is primarily responsible for gas exchange in the body, allowing us to take in oxygen and expel carbon dioxide. It consists of several key components, including the lungs, which are essential for the exchange of gases, and the pathways that facilitate airflow to and from the lungs. These pathways include the nose and throat, which serve as the initial entry points for air. The airways further transport the inhaled air into the lungs where the actual gas exchange occurs. Therefore, the correct answer accurately encapsulates the essential components of the respiratory system, highlighting the interconnected roles of the lungs, nose, throat, and airways in the process of respiration. Understanding this system is crucial for recognizing how oxygen is delivered to the body and how carbon dioxide is removed, which is critical for maintaining overall health.