White Blood Cells

Transportation in animals and plants of Class 7

  • They are much fewer in number than the RBCs ( 5,000 to 10,000 per cubic millimeter) and these cells possess a nucleus but no haemoglobin . They are larger than the RBCs in size and possess the power of amoeboid movement.
  • The chief  function of white blood cells is to defend the body against  disease-germs. WBCs produce antibodies which are responsible for providing immunity.
  • WBCs also ingest and destroy bacteria and dead cells by engulfing and digesting them.

 

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