Human respiratory system diagram: Human nasal cavity Sagittal view

human nasal cavity Sagittal view of the human nasal cavity. The human gas-exchanging organ, the lung, is located in the thorax, where its delicate tissues are protected by the bony and muscular thoracic cage. The respiratory system plays a vital role in maintaining life by facilitating the exchange of oxygen and carbon dioxide between the body and the environment. Learn about the human respiratory system , its organs, and how it works. See a diagram of the respiratory system and its components, such as nose, pharynx, larynx, trachea, bronchi, lungs, alveoli, and diaphragm. Human Respiratory System and it’s Mechanism! The human respiratory system consists of a pair of lungs and a series of air passages leading to the lungs. The entire respiratory tract (passage) consists of the nose, pharynx, larynx, trachea, bronchi, and bronchioles.