The Complement System: Classical, Lectin, and Alternative Pathways

We are learning about the features of innate immunity, and one that is often overlooked is the complement system. This is a very complicated ensemble of proteins circulating in the bloodstream that activate each other in a specific sequence that results in immune system engagement to kill pathogens. It's quite involved with multiple possible pathways, so this will take a while, but let's dig into this important system now! Script by Stephanie Melchor Select images provided by Watch the whole Immunology playlist: General Chemistry Tutorials: Organic Chemistry Tutorials: Biochemistry Tutorials: Biology/Genetics Tutorials: Anatomy & Physiology Tutorials: Biopsychology Tutorials: Microbiology/Infectious Diseases Tutorials: http://bit.l