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CBSE Class 10 Answered

Platelets help in clotting of blood at injured side. 
Draw a flow diagram of this process. 
Asked by pdcavita | 01 Dec, 2017, 09:50: PM
answered-by-expert Expert Answer

 

  • The injured cells and the platelets disintegrate at the site of the wound and release thrombokinase or thromboplastin.
  • Thrombokinase with the help of calcium ions converts prothrombin of the plasma into thrombin.
  • Thrombin in the presence of calcium ions reacts with the soluble fibrinogen and converts it into insoluble fibrin. Fibrin is a solid substance which forms threads and a meshwork at the site of the wound.
  • Blood cells are trapped in the network of the fibrin. The blood shrinks and squeezes out the rest of the plasma in the form of a clear liquid. The solid mass which is left behind is called a clot or thrombus.

 

Answered by Sheetal Kolte | 02 Dec, 2017, 10:56: PM

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