ELI5- Why is it dangerous for a scuba diver to ascend too quickly?

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ELI5- Why is it dangerous for a scuba diver to ascend too quickly?

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Ascending too quickly from a depth can cause excess nitrogen from your oxygen cylinders to get absorbed more quickly by the blood due to the high pressure. More the pressure, more is the solubility of a gas. Too much nitrogen in the blood would mean too little oxygen is reaching your lungs and nitrogen bubbles will block your blood vessels a condition called “The Bends”.

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