Dynamical

Every  biological  system—microbe,  athlete,  or team—can  be  described  formally  in  terms  of  its time  evolution  or  dynamics.  This  becomes  feasible  if  one  capitalizes  on  a  crucial  characteristic of  biological  systems,  namely  that  they  exchange energy and matter, and in some cases also information, with their surroundings. In statistical physics, such systems are called open systems