Erythrocytes are microscopic cells also called:

• A. White Blood Cells
• B. Red Blood Cells
• C. Platelets
• D. Plasma

Answer: (B)

Erythrocytes are the red blood cells that carry oxygen in the bloodstream via hemoglobin. They’re the most abundant cells in blood and give it its characteristic red color. They’re distinct from white blood cells, which defend against infections, and from platelets, which help with clotting. Plasma is the liquid component of blood. Since erythrocyte literally means “red cell,” the common name for these cells is Red Blood Cells.