The Innate vs. Adaptive Immune Response - Healio Immune system | Microbes and the human body - Microbiology Society The second line of defence takes action when the first line of defence has failed. The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies. Characteristics of an innate immune system are present in most, if not all, The immune system has three lines of defense. Introduction to the Immune Response Page 3 Rev 11/11/10 II. These cells are part of our specific (or adaptive) immune system and are the third line of defence. Third line of defence The third and final line of defence is the immune response. Start studying The Immune System (Three Lines of Defense). • Involve nonspecific ( Second line ) and specific ( Third line ) immune defense systems • White blood cells (WBC) or leukocytes are involved WBC • WBC recognize "self" markers on the host cell - Do not attack or do not respond to host cell • WBC recognize non-self markers on the invading microbe -Attack or respond to microbe The Immune System - Rabies Innate immune system. Examples of innate immunity include: Cough reflex; Enzymes in tears . 3.Whatisamechanicalbarrier?Giveanexample. The 3 lines of defense of the body - MICROBIOLOGY The Immune system - The Immune System 5.Whatisabiologicalbarrier?Giveanexample. Immune system - Wikipedia First Line of Defense. 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). Skin cells produce and secrete important antimicrobial proteins, and immune cells can be found in specific layers . DOC Biology 11: Immune System and Disease Worksheets - CCHS The third line of defence is engaged if the first and second lines of defence fail. 2.WhatismeantbyThe First Line of Defense? Cell mediated immunity and humoral immunity . Specific Resistance (Acquired Immunity) Physical and Chemical Barriers (Innate Immunity) Physical and chemical barriers form the first line of defense when the body is invaded. The immune system of the human body in defence against disease . The immune system protects its host from infection with layered defenses of increasing specificity. How Does the Immune System Fight COVID-19? - GoodRx The immune system relies on three main lines of defence, two of which are non-specific to the pathogen, and one of which is specific to fighting one particular type of germ.