Question

The solid portion of the blood is primarily made up if what?
A. Plasma
B. Ted blood cells
C. White blood cells
D. Platelets

Answer 1

B. Red blood cells.

The solid portion of blood is fromed by cells: red blood cells, white blood cells and platelets. Plasma is the liquid portion of blood.
Among the blood cells, the most numerous are red blood cells. Thus, they are the primary in the formation of solid portion of blood.