Question

the most numerous cells of blood are
leukocytes (wbcs)
thrombocytes.
mast cells.
erythrocytes (rbcs)

Explanation:

Erythrocytes (RBCs) are the most abundant cells in blood. They are responsible for transporting oxygen throughout the body. Leukocytes (WBCs) are part of the immune - system and are fewer in number. Thrombocytes are involved in blood clotting and are also less numerous. Mast cells are not the most numerous blood cells.

Answer:

erythrocytes (RBCs)