Hemoglobin is primarily found in which type of cells?

• A. White blood cells (leukocytes)
• B. Platelets (thrombocytes)
• C. Red blood cells (erythrocytes)
• D. Liver cells (hepatocytes)

Answer: (C)

Verified step by step guidance

1. Understand the function of hemoglobin: Hemoglobin is a protein responsible for transporting oxygen from the lungs to tissues and carrying carbon dioxide back to the lungs for exhalation.
2. Identify the type of cell specialized for oxygen transport: Red blood cells (erythrocytes) are uniquely adapted for this function due to their biconcave shape and lack of nucleus, which maximizes space for hemoglobin.
3. Eliminate incorrect options: White blood cells (leukocytes) are involved in immune defense, platelets (thrombocytes) are involved in blood clotting, and liver cells (hepatocytes) are involved in metabolism and detoxification. None of these are primarily responsible for oxygen transport.
4. Confirm the correct answer: Hemoglobin is primarily found in red blood cells (erythrocytes), as these cells are specialized for carrying oxygen and carbon dioxide.
5. Relate the importance of hemoglobin to overall physiology: Hemoglobin's role in oxygen transport is critical for cellular respiration, which provides energy for all biological processes.