GE 6Device Universal Remote Control, Backlit, Silver, 33712 Walmart from www.walmart.com The main function of the respiratory system is to take in oxygen and expel carbon dioxide. It is responsible for the process of breathing, which involves inhaling oxygen from the atmosphere into the lungs and exhaling carbon dioxide back out. The respiratory system consists of several organs and structures, including the nose, mouth, throat, trachea, bronchi, and lungs. When we inhale, air enters the body through the nose or mouth and travels down the throat into the trachea. The trachea then splits into two bronchi, which lead to the lungs. Within the lungs, the bronchi branch out into smaller tubes called bronchioles, which eventually end in small air sacs called alveoli. The alveoli are surrounded by tiny blood vessels called capillaries. It is at this point that the exchange of gases occurs. Oxygen from the inhaled air diffuses across the walls of the alveoli and enters the bloodstream, where it binds to red blood cells and is transported to all the cells in the body. At the same time, carbon dioxide, a waste product produced by the cells, diffuses out of the bloodstream into the alveoli and is then exhaled. In addition to gas exchange, the respiratory system also helps regulate the pH balance of the body. By adjusting the rate and depth of breathing, the body can control the levels of carbon dioxide and oxygen in the blood, which in turn helps maintain a stable pH level. Overall, the respiratory system plays a vital role in ensuring that the body receives enough oxygen for proper functioning and removes waste carbon dioxide. It works in conjunction with the circulatory system to deliver oxygen and nutrients to the cells and remove waste products.
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