The immune system. Adaptive body defenses are the body's specific defense system, or the third line of defense Functional system that recognizes antigens (foreign molecules) and acts to inactivate or destroy them . The Second Line Of Defense Of The Innate Immune System The body's second line of defence. Innate immunity: the first line of defense against SARS-CoV-2 Ready, set, infect! - Science in School PDF What are the 3 lines of defence against disease _____ A. Overview of the Immune System. The immune system of the human body in defence against disease The second line of defense of the "early-warning" system consists of natural killer cells, phagocytes, eosinophils, dendritic cells, macrophages, inflammation, fever, and antimicrobial substances (Joanne M. Willey, 2014). The immune system protects its host from infection with layered defenses of increasing specificity. The immune system also helps the host eliminate toxic or allergenic substances that enter through mucosal surfaces. This is the immune system. Stop infection before it begins and . The Immune System - Rabies 3. Innate Immunity Modulation by the IL-33/ST2 System in Intestinal Mucosa How Does the Immune System Work? - spermidineLIFE® US They are then transported in the blood to . This all gives off an . This immune system test series is for students taking human anatomy and physiology. Lymph is a clear, colourless liquid that passes through the tissues of the body. PDF Chapter 24 The Immune System and Disease Worksheets 2. However, if an immune response is activated when there is not a real threat or after the danger passes, the person suffers from allergic reactions and autoimmune disease. How immune cells defend themselves against HIV - ScienceDaily Some cancers, however, have developed the art of molecular deception .