"Blank" filtration of the blood is called dialysis.

1. Artificial
2. Natural

The circulatory system removes waste products from:

A.blood
B.cells
C.blood and cells
D.skin

Rh blood factor is determined by:

A.the presence or absence of a particular leukocyte
B.the presence or absence of a particular erythrocyte protein
C.the presence or absence of a particular plasma
D.the positive or negative characteristics of platelets