1. These cells are part of our specific (or adaptive) immune system and are the third line of defence. The theme of the first table is the three lines of defense. 3rd Line of . immune system, the complex group of defense responses found in humans and other advanced vertebrates that helps repel disease-causing organisms (pathogens). Innate and adaptive immune system There are two subsystems within the immune system, known as the innate (non-specific) immune system and the adaptive (specific) immune system. The immune system protects its host from infection with layered defenses of increasing specificity. It can be hard to know how best to do that. The second line of defence is (like the first line of defence): - innate: not learned and non-adaptive which means it cannot adjust. The skin and the mucous membranes work together to protect your body as much as it can. Introduction to the Immune Response Page 3 Rev 11/11/10 II. The process: 1. macrophage engulfs foreign material 2. foreign material is enclosed into a vesicle 3. the vesicle combines to a lysosome within the cell 4. lysosomes contain digestive enzymes which break down the foreign material 5. antigens of the foreign material are presented to the T-cell Inflammatory response Layered defense. The invading microbe or pathogen is called an antigen. PDF What are the 3 lines of defence against disease The first line of defense is the surface coverage of our bodies, which does begin with the skin. The immune system is spread throughout the body and involves many types of cells, organs, proteins, and tissues. The bacterium is attracted to the membrane of the phagocyte. The innate immune system: the first line of defense. PDF Chapter 16/17: Immune system - San Diego Miramar College If pathogens make it past the primary defences, in order for them to be killed the non-specific phagocytes, that are manufactured in our bone marrow, must destroy them! Human immunodeficiency viruses attack different cells of the human immune system, most frequently, "T helper cells." These lymphocytes play a key role in immune defense, since they activate other .
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