Mekanisme Pertahanan Badan

Mekanisme pertahanan badan (the body’s defence mechanism) melindungi badan daripada jangkitan penyakit melalui tiga jenis pertahanan (three lines of defence system):

1. Barisan pertahanan pertama (first line of defence) – kulit dan membran mukus (skin & mucous membrane).
   
   
2. Barisan pertahanan kedua (second line of defence) – fagosit (phagocytes).
   
   
3. Barisan pertahanan ketiga (third line of defence) – limfosit (lymphocytes).