Explain different pathways that activate complement system and its various effects to eliminate the pathogens.

The complement system is a crucial component of the immune system, playing a vital role in host defense against pathogens. It consists of a complex cascade of proteins that can be activated through three main pathways: the classical pathway, the lectin pathway, and the alternative pathway. Each pathway has distinct triggers and mechanisms of activation, leading to a series of events that result in the elimination of pathogens. The activation of the complement system enhances the immune response by promoting inflammation, opsonization, and direct lysis of the pathogens.

1. Classical Pathway:
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