Answers

2016-01-29T22:02:29+05:30
It is made up of cells, tissues, and organs that to protect the body. Important cell involved are WBCs , the biological name is leukocytes,it attacks invading germs (destroy disease-causing organisms)
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2016-01-31T15:40:32+05:30
The immune system is made up of a network of cells, tissues, and organs that work together to protect the body. One of the important cells involved are white blood cells, also called leukocytes, which come in two basic types that combine to seek out and destroy disease-causing organisms or substances.
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