  The internal motions of biomatter immersed in biofluid are investigated. The
interactions between the fragments of biomatter and its surrounding biofluid
are modeled using field theory. In the model, the biomatter is coupled to the
gauge field representing the biofluid. It is shown that at non-relativistic
limit various equation of motions, from the well-known Sine-Gordon equation to
the simultaneous nonlinear equations, can be reproduced within a single
framework.
