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The chart below is a summary of blood clotting mechanisms in man.
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  1. Name
    1. The blood cells represented by X.   
    2. Metal ion represented by Y.  
  2. Identify product Z and state its significance. 

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  1.  
    1. Platelets
    2. Calcium ions / Ca+2
  2. Fibrin; it forms an insoluble meshwork that seals the broken surface.
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X: Red blood cells
Y:Calcium ions
Z:Fibrin- forms a meshwork on the injured vessel hence a blood clot 
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