A fluid pump for pumping fluid. The fluid pump includes a driver having a
substantially tubular shaped body defining a body axis and, a number of
elements circumferentially spaced around the body. Each element is
responsive to a signal to so as cause a corresponding portion of the body
to expand or contract in a direction substantially parallel to the tube
axis. The pump also includes an urging member positioned in a flow path.
In use, the urging member is coupled to the driver such that selective
expansion and/or contraction of the body causes the urging member to
rotate, thereby urging fluid along the flow path.