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Respiratory System. Several organs of the respiratory system are responsible for the process of breathing. The nose, pharynx, larynx, trachea, bronchi, and lungs work together to allow gas exchange to occur at the cellular level.
The respiratory system, which controls breathing and respiration, consists of the respiratory tract and the lungs. The respiratory tract cleans, warms, and moistens air on its way to the lungs. The tract can be divided into an upper and a lower part.The upper part consists of the nose, nasal cavity, pharynx (throat), larynx, and upper part of the trachea (windpipe).he nose and nasal cavity. The nose is the only external part of the respiratory system. It is made of bone and cartilage (tough connective tissue) and is covered with skin. The two openings to the outside, called nostrils, allow air to enter or leave the body during breathing.