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Answer: The immune system is consist of a group of cells, tissues, and organs that work together to protect the body, out of which the most important cells involved are white blood cells, also called leukocytes. The role of immune system is to keep infectious microorganisms, such as certain bacteria, viruses, and fungi, out of the body and also destroy any infectious microorganisms that do invade the body. It acts as a protective mechanism of the body. There is blood and protein in the urine as due to proteinuria as normally kidney does not allow these things to filter in the urine but due to abnormal function of the kidney as well as increased amount of protein causes blood in the urine.
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