Step on the brakes and you pump fluid through a cylinder (see graphic) and down a narrow pipe to the brakes.

When we're up and about our calf muscles pump fluid back up to the heart.

The newly emerged adults then climb on a plant or some other surface, and pump fluid into their wings to extend them.

Three dynamic seals in series prevented the pump fluid and turbine gas from mixing.

Permissive hypotension relies on the heart's ability to pump fluid through the body efficiently.