1. Arteries
  2. Veins
  3. White Blood Cells
  4. Platelets
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1 Answers

Option 2 : Veins

 Arteries

 carry oxygenated blood from the heart to the tissues

 Veins

 carry deoxygenated blood from all parts of body back to the heart

 White blood cells 

 protecting the body against both infectious disease and foreign invaders 

 Platelets

 prevents bleeding

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