Cards (6)

    • red blood cells carry oxygen
    • features of red blood cells
      large surface area
      dont have a nucleus
      contain haemoglobin
    • white blood cells defend against infection
    • features of white blood cells
      have a nucleus
      produce antibodies to fight microorganisms
    • platelets help blood clot
    • features of platelets
      no nucleus
      help blood clot at wound