Explain the Complement System

To remove a microorganism by phagocytosis requires phagocytes at the right place in the right time. The organism should adhere to the phagocyte. Many of these organisms may not be viable to this type of a situation. To deal with such a situation, therefore, one more non-specific defence mechanism is found in plasma. This is known as the complement system. Complement system contains about 20 proteins, when triggered can enter into cascade reaction (occurs one after the other sequentially, with a number of factors).