Question: 2.b The main purpose of the respiratory system is to supply oxygen to the blood and remove carbon dioxide This is done through the process

2.b The main purpose of the respiratory system is
2.b The main purpose of the respiratory system is to supply oxygen to the blood and remove carbon dioxide This is done through the process of breathing. Oxygen passes into the lungs into the alveoli , where it diffuses into the blood. Carbon dioxide is transferred from the cappillaries back into the lungs, where it is breathed out to expel from the body

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