Pattern formation dynamics of the blood clotting system was investigat
ed using a reaction-diffusion model based on modem biochemical concept
s. It is shown through analysis of the model that the pattern formatio
n mechanism in the blood significantly differs from the well known fun
damental Turing's mechanism. Within the mechanism discovered the human
blood is treated as the specific new-type active medium, in which the
pattern formation is determined by the interplay of two autowaves.