General Science • BiologyMedium
What is the primary function of red blood cells in human blood circulation?
A. Fighting bacterial infections
B. Transporting oxygen from lungs to body tissues✓ Correct Answer
C. Clotting blood at injury sites
D. Regulating body temperature
💡 Solution & Explanation
Red blood cells contain the respiratory pigment hemoglobin, which binds reversibly with oxygen in the lungs and transports it to respiring tissues throughout the body. White blood cells defend against pathogens, and platelets facilitate blood clotting. Mature mammalian red blood cells lack a nucleus and organelles to maximize internal volume for hemoglobin.
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