Which component of blood carries most oxygen from the lungs to body tissues?
Correct answer: B. Red blood cells
- A. Plasma proteins
- B. Red blood cells
- C. White blood cells
- D. Platelets
Explanation
Red blood cells carry haemoglobin, which binds oxygen in the lungs and releases it to tissues. Plasma mainly transports dissolved substances, while white blood cells defend against infection and platelets help with clotting.
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About Blood and Immunity
Blood and immunity covers plasma, red blood cells, white blood cells, platelets, haemoglobin, blood groups and haemostasis. It explains innate and adaptive defenses, antibodies, lymphocytes, inflammation, vaccination and immune memory, with a distinction between active and passive immunity and between antigen and antibody.
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