Changes

===[[Complement|Complement]]===

===[[Complement|Complement]]===

* The Complement system is a group of about 30 proteins within the body fluids of all vertebrates and some invertebrates

The Complement system is a group of about 30 proteins within the body fluids of all vertebrates and some invertebrates. The main functions of complement are to promote '''[[Phagocytosis|phagocytosis]]''' or causes lysis of an invading organism.

* Complement promotes '''phagocytosis''' or causes lysis of an invading organism

* Complement acts as a cascade, like the blood clotting system

** The early enzymes in the cascade are bound to invading bacteria and fungi

The complement acts as a cascade, like the blood clotting system. It begins with the the early enzymes in the cascade binding to invading bacteria and fungi as they have an affinity for components of microbial cell membranes. This binding initiates a cascade so that the binding of one molecule will eventually lead to the fixation of millions of later molecules. SOme of the the early components act as targets for phagocytes while the later components punch holes in bacteria, causing their lysis.

*** They have an affinity for components of microbial cell membranes

** This binding initiates a cascade so that the binding of one molecule will eventually lead to the fixation of millions of later molecules  

* The early components act as targets for phagocytes

* The later components punch holes in bacteria, causing their lysis

===Interferons===

===Interferons===