The human respiratory system helps us breathe and exchange gases like oxygen and carbon dioxide with the air around us. It includes a few important parts: the nose or mouth, trachea, bronchi, lungs, and diaphragm. When we breathe in, air comes in through our nose or mouth, gets cleaned and warmed, and then goes down a tube called the trachea. This tube splits into the bronchi, which lead to our lungs. Inside the lungs, there are tiny air sacs called alveoli that help swap oxygen and carbon dioxide with our blood. The diaphragm is a muscle right under the lungs that helps us breathe. It works like a pump: it contracts to pull air in and relaxes to push air out.

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The human respiratory system is essential for breathing and facilitating the exchange of gases, such as oxygen and carbon dioxide, with the surrounding environment. It consists of several key components: the nose or mouth, trachea, bronchi, lungs, and diaphragm. When we inhale, air enters through the nose or mouth, where it is filtered and warmed, before traveling down the trachea. This tube branches into the bronchi, which direct the air into the lungs. Within the lungs, there are small air sacs known as alveoli that facilitate the exchange of oxygen and carbon dioxide with the bloodstream. The diaphragm, a muscle located just below the lungs, plays a crucial role in respiration by functioning as a pump: it contracts to draw air in and relaxes to expel air.