the process of breathing is also called _____.
The process of breathing is generally referred to as respiration. It involves the inhalation of atmospheric oxygen and the exhalation of carbon dioxide, which is a metabolic waste product. The breathing process is facilitated by the respiratory system, which is primarily composed of the lungs, diaphragm, trachea and bronchi. Inhalation, also known as inspiration, starts by taking in oxygen-rich air through the nose and mouth. The air travels down the back of the throat and then into the trachea where impurities are removed.