Which of the following are the most numerous cells in the blood?

• A. Erythrocytes (red blood cells)
• B. Lymphocytes
• C. Platelets (thrombocytes)
• D. Neutrophils

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the types of cells listed in the problem: erythrocytes (red blood cells), lymphocytes, platelets (thrombocytes), and neutrophils. Each has a specific function and typical abundance in the blood.
2. Step 2: Recall that erythrocytes are responsible for oxygen transport and are known to be very abundant in the bloodstream compared to other cell types.
3. Step 3: Recognize that lymphocytes and neutrophils are types of white blood cells involved in immune responses, but they are present in much smaller numbers than erythrocytes.
4. Step 4: Note that platelets are cell fragments involved in blood clotting and are also less numerous than erythrocytes.
5. Step 5: Conclude that among the options, erythrocytes are the most numerous cells in the blood due to their critical role and high concentration.