How The Immune System ACTUALLY Works – IMMUNE

The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies Antibodies

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digestive system IMMUNE SYSTEM definition: 1 the cells and tissues in the body that make it able to protect itself against infection 2 the… Learn more

respiratory system Explore the basics about the immune system with The Amoeba Sisters! This video talks about