抄録
Circulation of blood as a physical phenomenon could be analyzed by the application of the principle of fluid dynamics. Because blood is noncompressible viscous fluid and blood vessels are viscoelastic tube and the motion of blood in blood vessels is pulsatil and quite complex, there can be found no analogy in physics and engineering.
Theories and experiments of the field has been quite primitive and had serious approximations till recent decade. Modern development of medical electronics and biological engineering brought much progress in the theories and experiments of hemodynamics. The author intends to present necessary conditions and limitations of these theories and methods from the biological, stand point to the non-medical readers.
