Too fast ascent of divers from great depths leads to decompression sickness. What is the cause of this disease?

1) More gases dissolve in the blood at depth at high pressure than at normal atmospheric pressure.
2) With a rapid ascent from depth, the pressure drops sharply, and gases do not have time to be released through the respiratory system.
3) Gas bubbles form in the blood, which clog the blood vessels, preventing the blood supply to organs and tissues. This often leads to the death of divers.

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