The human respiratory system consists of several key organs, including the nose, pharynx, larynx, trachea, bronchi, and lungs. Air enters the body through the nose or mouth, where it is filtered, warmed, and moistened. It then travels down the trachea, which branches into bronchi leading to the lungs. Within the lungs, the bronchi further divide into smaller bronchioles, ending in alveoli, where the exchange of oxygen and carbon dioxide occurs. The diaphragm and intercostal muscles facilitate breathing by contracting and relaxing to create pressure changes in the thoracic cavity.

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Answer 1

The human respiratory system includes the nose, pharynx, larynx, trachea, bronchi, and lungs. Air enters through the nose or mouth, where it is filtered, warmed, and moistened, then travels down the trachea into the bronchi and lungs. In the lungs, bronchioles lead to alveoli, where oxygen and carbon dioxide are exchanged. Breathing is assisted by the diaphragm and intercostal muscles, which create pressure changes in the thoracic cavity.