![]() The nose is the only externally visible part of the respiratory system. The organs of the respiratory system include the nose, pharynx, larynx, trachea, bronchi, and their smaller branches, and the lungs, which contain the alveoli. Humidifier. Purify, humidify, and warm incoming air.Passageway. Passageways that allow air to reach the lungs.Gas exchange. The respiratory system organs oversee the gas exchanges that occur between the blood and the external environment.Elimination. Elimination of carbon dioxide.Oxygen supplier. The job of the respiratory system is to keep the body constantly supplied with oxygen.The functions of the respiratory system are: Age-Related Physiological Changes in the Respiratory System.External Respiration, Gas Transport, and Internal Respiration.We cannot “do without oxygen” for even a little while, as we can without food or water. ![]() The trillions of cells in the body require an abundant and continuous supply of oxygen to carry out their vital functions.
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