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The main organs of the respiratory system are the nose, pharynx, trachea, bronchi, and lungs.he respiratory system â¦ does this through  breathing. When we breathe, we inhale oxygen and exhale carbon  dioxide. This exchange of gases is the respiratory system's means  of getting oxygen to the blood. To ensure that the body receives  enough oxygen and to expel waste, carbon dioxide.
The major functions of the respiratory system are: 1. -Gas exchange: the respiratory system allows oxygen in the air to enter the blood and carbon dioxide to leave the blood and enter the air. The cardiovascular system transports oxygen from the lungs to the cells of the body and carbon dioxide from the cells of the body to the lungs. 2. -Regulation of blood pH, which can be altered by changes in blood carbon dioxide levels. 3. -Voice production as air moves past the vocal cords to make sound and speech.