White blood cells are referred to as _________.

• A. Platelets.
• B. Erythrocytes.
• C. Leukocytes.
• D. Megakaryocytes.

Answer: (C)

Verified step by step guidance

1. Understand that the problem is asking for the correct term used to refer to white blood cells.
2. Recall that white blood cells are a crucial part of the immune system, responsible for defending the body against infections and foreign invaders.
3. Review the list of options provided: Platelets, Erythrocytes, Leukocytes, and Megakaryocytes.
4. Identify that 'Leukocytes' is the term used for white blood cells. The prefix 'leuko-' means white, and '-cytes' means cells, which directly relates to white blood cells.
5. Confirm that the other options do not refer to white blood cells: Platelets are involved in clotting, Erythrocytes are red blood cells, and Megakaryocytes are large bone marrow cells that produce platelets.