What Does the Aortic Valve Do? Every cell in your body needs oxygen to survive, so all of your organs must get always be getting a fresh supply of oxygen from your blood. Your heart pumps blood to yourlungs, which add oxygen to the blood. This oxygen-rich blood flows back into the h...
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In insects, a few land arachnids, and myriapods, the trachea is an elaborate system of small, branching tubes that carry oxygen to individual body cells; in most land vertebrates, the trachea is the windpipe, which conveys air from the larynx to the two main bronchi, with the lungs and ...