The two processes use oxygen

There exist a positive correlation between cellular respiration and respiratory system. The two processes use oxygen. According to Chira (2010), cellular respiration is the process of oxidizing food molecules, like glucose, to carbon dioxide and water (p.61). Cellular respiration consumes oxygen producing carbon dioxide in the process of the production of energy. Oxygen plays a critical role when it comes to the transport energy to the body tissues. In the respiratory system, oxygen inhaled through the nostrils to the alveoli, circulates into the blood capillaries entering the red blood cells. At the same time, carbon dioxide diffuses into the alveoli from where it goes out through the ventilation process (Davies & Moores, 2003, p. 3) thus carbon dioxide becomes a product in both exhalation and inhalation processes.