Which type of blood cell is the most numerous in the human body?

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

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the types of blood cells mentioned: Lymphocytes and Neutrophils are types of white blood cells, Platelets (thrombocytes) are cell fragments involved in clotting, and Erythrocytes are red blood cells responsible for oxygen transport.
2. Step 2: Recall the general quantities of these cells in the human bloodstream. Erythrocytes are known to be the most abundant, typically numbering in the millions per microliter of blood, whereas white blood cells and platelets are present in much smaller quantities.
3. Step 3: Recognize that the primary function of erythrocytes (red blood cells) is to carry oxygen from the lungs to tissues and return carbon dioxide for exhalation, which requires a large number of cells to efficiently perform this task.
4. Step 4: Compare the relative abundance: Neutrophils are the most common white blood cells but still far fewer than erythrocytes; lymphocytes are fewer than neutrophils; platelets are numerous but still less than erythrocytes.
5. Step 5: Conclude that erythrocytes are the most numerous blood cells in the human body based on their critical oxygen-carrying role and their high concentration in blood.