The human respiratory system is primarily responsible for the exchange of gases, particularly oxygen and carbon dioxide, between the body and the environment. It consists of several key organs, including the nose or mouth, trachea, bronchi, lungs, and diaphragm. Air enters through the nasal passages or mouth, is filtered and warmed, and then travels down the trachea into the bronchi, which branch into the lungs. Within the lungs, alveoli—tiny air sacs—facilitate the exchange of gases with the blood. The diaphragm, a muscle located below the lungs, plays a crucial role in breathing by contracting to allow air in and relaxing to push air out.
In 3-5 complete sentences describe the human respiratory system - the organs and their functionsk
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