Question

what type of cell makes up almost half the volume of blood?
monocytes
lymphocytes
platelet
white blood cells
red blood cells

Explanation:

Red blood cells (erythrocytes) are the most abundant cells in blood and make up approximately 40 - 45% of blood volume, which is almost half. Monocytes, lymphocytes are types of white blood cells (leukocytes) which are less in number. Platelets (thrombocytes) are cell fragments and also less abundant. White blood cells overall are a small fraction compared to red blood cells.

Answer:

E. red blood cells