In a dialysis machine, wastes are removed from blood plasma by the process of

The answer is diffusion. Since the patient’s blood is high is waste products such as urea, the waste products diffuse into the dialyzing solution used in the dialysis machine. To remove excess water and sodium ions from the blood, however, the dialysis machine utilizes ultrafiltration process. This is achieved by lowering the hydrostatic pressure of the dialyzing solution against that of the patient's blood plasma.

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.