Last night I played a blank tape at full volume. The mime next door went crazy.

The cells are:

Red blood cells or erythrocytes (96%). In mammals, mature red blood cells lack a nucleus and organelles. They contain the blood's haemoglobin and distribute oxygen. The red blood cells (together with endothelial vessel cells and some other cells) are also marked by glycoproteins that define the different blood types.
White blood cells or leukocytes (3.0%), are part of the immune system; they destroy infectious agents, pathogens.
Platelets or thrombocytes (1.0%) are responsible for blood clotting (coagulation). They change fibrinogen into fibrin. This fibrin creates a mesh onto which red blood cells collect and clot. This clot stops more blood from leaving the body and also helps to prevent bacteria from entering the body

It also says that plasma makes up 55% and the cells 45% of blood.