Question

the mixture of plasma and blood cells is called: a packed blood. b serum. c transfusion. d whole blood.

Explanation:

Whole blood is composed of plasma and blood - cells. Packed blood mainly contains blood cells with most of the plasma removed. Serum is plasma without clotting factors. Transfusion is a medical procedure of transferring blood or blood - products into a person's circulation.

Answer:

D. whole blood