What Are The Primary Defenses Against Viruses?

What is the 2nd line of defense?

If pathogens are able to get past the first line of defence, for example, through a cut in your skin, an infection develops.

The second line of defence is a group of cells, tissues and organs that work together to protect the body.

This is the immune system..

What is the first line of defense?

The first line of defence is your innate immune system. Level one of this system consists of physical barriers like your skin and the mucosal lining in your respiratory tract. The tears, sweat, saliva and mucous produced by the skin and mucosal lining are part of that physical barrier, too.

What are specific host defenses of the body?

Host defenses that protect against infection include. Natural barriers (eg, skin, mucous membranes) Nonspecific immune responses (eg, phagocytic cells [neutrophils, macrophages] and their products) Specific immune responses (eg, antibodies, lymphocytes)

What are specific defenses of the immune system?

The Innate vs. Adaptive Immune ResponseLine of DefenseExamplesInnate (non-specific)FirstSkin, hair, cough, mucous membranes, phagocytes, granulocytesAdaptive (specific)SecondPus, swelling, redness, pain, T and B lymphocyte response

Why are there 3 lines of defense?

“The new Three Lines Model helps organizations better identify and structure interactions and responsibilities of key players toward achieving more effective alignment, collaboration, accountability and, ultimately, objectives.”

What are the 3 lines of immune defense?

The Immune System has 3 Lines of Defense Against Foreign Pathogens:Physical and Chemical Barriers (Innate Immunity)Nonspecific Resistance (Innate Immunity)Specific Resistance (Acquired Immunity)

What are examples of specific defenses?

Specific Defense (The Immune System)Recognition. The antigen or cell is recognized as nonself. … Lymphocyte selection. The primary defending cells of the immune system are certain white blood cells called lymphocytes. … Lymphocyte activation. … Destruction of the foreign substance.

Which are examples of non specific defenses?

Examples of nonspecific defenses include physical barriers, protein defenses, cellular defenses, inflammation, and fever.Barriers. One way for an organism to defend itself against invasion is through barriers that separate the organism from its environment. … Proteins. … Cellular Defenses. … Inflammation. … Fever. … Bibliography.

Is inflammation a second line of defense?

The second line of defense attacks pathogens that manage to enter the body. The second line of defense includes the inflammatory response and phagocytosis by nonspecific leukocytes.

Is Fever second line of defense?

In our bodies the second line of defense is non-specific immune responses – macrophages, neutrophils, interferons, and complement proteins. This line of defense also includes fever and inflammatory response as nonspecific defenses. … Our third line of defense is specific immune responses – T Cells and B Cells.

What is the 1st 2nd and 3rd line of defense?

The first line of defense are the physical and chemical barriers, which are considered functions of innate immunity. … The third line of defense is specific resistance, which is considered a function of acquired immunity.