Respiratory System

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The respiratory system begins with air entering through the nose or mouth, where it is filtered, warmed, and moistened before traveling down the trachea (windpipe). The trachea branches into smaller tubes called bronchi, which further divide into bronchioles that lead to tiny air sacs called alveoli in the lungs. • At the alveoli, oxygen from the air diffuses into the bloodstream while carbon dioxide, a waste product of cellular metabolism, diffuses out of the bloodstream into the alveoli to be exhaled. This gas exchange process is facilitated by the thin walls of the alveoli and the network of blood vessels surrounding them. • The diaphragm, a dome-shaped muscle below the lungs, plays a crucial role in breathing. When it contracts, it flattens out, increasing the volume of the chest cavity and causing air to be drawn into the lungs (inhalation). When it relaxes, the chest cavity decreases in volume, causing air to be expelled from the lungs (exhalation). • Overall, the respiratory system ensures that the body receives an adequate supply of oxygen for cellular respiration and removes carbon dioxide, maintaining a balance in blood gas levels crucial for survival. • #easytounderstand • #biology #education #biochemistry #anatomy #respiration #respiratorysystem

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