What component of the blood is primarily responsible for transporting oxygen?

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

Answer: (C)

Verified step by step guidance

1. Understand the function of each blood component: Leukocytes (white blood cells) are primarily involved in immune response, Plasma is the liquid component that carries nutrients, hormones, and waste products, Erythrocytes (red blood cells) are responsible for transporting oxygen, and Platelets are involved in blood clotting.
2. Focus on the role of Erythrocytes: These cells contain hemoglobin, a protein that binds oxygen molecules. This binding allows erythrocytes to transport oxygen from the lungs to tissues throughout the body.
3. Consider the structure of hemoglobin: Hemoglobin is composed of four subunits, each containing an iron atom that can bind one oxygen molecule. This structure is crucial for its oxygen-carrying capacity.
4. Recognize the importance of erythrocytes in oxygen transport: Erythrocytes are uniquely adapted for this function due to their biconcave shape, which increases surface area for oxygen exchange, and their flexibility, allowing them to navigate through narrow capillaries.
5. Conclude that erythrocytes are the primary component responsible for oxygen transport in the blood, distinguishing them from other blood components that have different primary functions.