Feasibility of a Synthetic Buoyancy Bladder, Used in the Air

Many fish have specialized organs called buoyancy bladders which allow them to control their buoyancy - effectively rising or sinking in the water.

What if humans adapted this to use in the air? I'm picturing something like a balloon, strapped to the user's back, that filters specific gasses less dense or more dense than air to fill itself. It would be able to calculate what ratio of x to y was necessary to move the person up, down, etc.

A) Is there any reason this is not possible, and

B) If possible, what are the limitations / things to consider?

posted over 7 years ago

Zxyrra‭

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