What are the structure and function on the respitory?

The respiratory system consists primarily of the nasal cavity, pharynx, larynx, trachea, bronchi, and lungs. Its main function is to facilitate gas exchange, allowing oxygen to be inhaled into the bloodstream and carbon dioxide to be expelled from the body. The alveoli, tiny air sacs within the lungs, are crucial for this exchange, as they provide a large surface area for oxygen and carbon dioxide to diffuse between the air and blood. Additionally, the respiratory system helps regulate pH levels in the body and plays a role in vocalization.