Saturday, May 4, 2013

Immune System

The immune system is the body's defence against pathogens and other infectious microorganism and is made up at a network of cells, tissues and organs. The cells involved are several types of white blood cells each with specific roles such as fighting infections and destroy cancerous cells. Lymphocytes 'remember' the previous invaders and will make the specific antibodies to attack the same germ if it enters the body again.

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