What is the main function of red blood cells?
Answer and explanation
Correct answer: B. They carry oxygen bound to haemoglobin
- Step 1: Red blood cells contain haemoglobin. Step 2. Haemoglobin binds oxygen in the lungs and releases it in the tissues. Answer: they carry oxygen. Why not the others: antibodies come from plasma cells, clotting is done by platelets and digestion takes place in the gut.
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