Wow! Very interesting stuff but every time I see something interesting, I have more questions than answers. For example, what happens to the fluid in your body? If it floats around, won't we die???
Which fluids are you talking about specifically? I've very little knowledge of anatomy but I think most of the liquids in our body are in "closed-loop" pressurised systems, with nowhere for the fluid to "go" whilst being forced in to motion by our muscles.