I keep getting “Blood components” questions wrong in Body Fluids & Circulation. What's the trap?
thinking white cells carry oxygen.
The usual trap: thinking white cells carry oxygen. How to avoid it: red cells carry oxygen; white cells fight infection. Go back to the definition — plasma (fluid), red cells (carry O₂), white cells (defence) and platelets (clotting).
Key point
Blood components
Common mistake
thinking white cells carry oxygen.
Memory tip
red cells carry oxygen; white cells fight infection.
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