What Are White Blood Cells | Health | Biology | FuseSchool
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YouTubeFuseSchool - Global Education
What Are White Blood Cells | Health | Biology | FuseSchool
Blood consists of red blood cells, white blood cells, platelets and plasma. White blood cells are our warriors; the army inside our body that protects us from infectious disease and foreign invaders. They make up less than 1% of our blood. Our body has a first line of defence, which we saw in the video on ‘bodies defence against pathogens ...
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