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How does a scuba diver breathe?
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A scuba diver breathes by using a regulator, which is connected to a tank of compressed air. The regulator allows the diver to inhale from the tank and exhale into the water. The tank is usually worn on the back or chest, and is held in place with a buoyancy compensator (BC). The BC helps keep the diver neutrally buoyant in the water, so that they can move around freely without sinking.