Question

What will happen if there are no platelets in the blood?

Answer 1

If there are no platelets present in the blood, then there will be no clotting of blood.

Platelets are the blood particles present in our blood.

Unlike RBC and WBC, these blood particles are mainly involved in blood clotting. Therefore, if there are "no platelets" in the blood, the blood is unable to clot.  

During an injury, the platelets present in the blood release some kind chemicals which clot the blood and prevent further from bleeding.

Answer 2

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If there are no platelets in the blood, then the blood would not be able to clot. A clot is formed because of platelets. They release blood clotting chemicals at the site of injury. These chemicals form a clot and prevent further bleeding.