<；P>；PROBLEM TO BE SOLVED: To provide a computer program and a simulation system, which can simulate a time change in concentration of object of a living body by using a mode of a block to easily correspond to a living organs. <；P>；SOLUTION: The simulation system comprises； a plurality of blocks 1-4, each of which displays one functions of the plurality of the living organs associated with object substance； a bio-simulation model 140b being built by using the plurality of the blocks that are coupled with each other so as to transfer data； and a calculating means for simulating an activity of the living organs by driving the bio-simulation model 140b and calculating the concentration of the object substance within the living body. <；P>；COPYRIGHT: (C)2006,JPO&NCIPI
