An experimental investigation is described in which principal emphasis is given to revealing the nature of the contribution of erythrocytes upon turbulence. It has as its central purpose the evaluation of a fluid containing erythrocytes on turbulence intensity. The experimental method consisted of introducing the steady flow of human blood through a precision orifice under controlled conditions at turbulent rates and studying the growth and evaluation of disturbed flow using hot-film methods. A principal conclusion to be drawn is that a new perspective, one that takes erythrocytes into account, is required in connection with the instability of flowing blood.