Immune System Immune system

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Presentation transcript:

Immune System Immune system

Nonspecific Defenses 1st line of Defense

Lysozyme Enzyme in tears and saliva

2nd line of defense Inflammatory response Phagocytes video link

2nd line of defense Serious Infection Increase WBC’s Fever Interferon

Specific Defenses

Lymphocytes White Blood Cells (WBC)

B-Lymphocytes Produce Antibodies Mature in Bone Marrow

Antibodies Y- shaped protein that binds to the antigen.

Antigen Substance that triggers the immune response.

Primary Immune Response Production of Antibodies from first exposure to antigen.

Secondary Immune Response Cells Remain after infection More powerful

Active Immunity Immunity produced by a vaccination.

Passive Immunity Antibodies from another organism.

T- Cell Identify foreign invader and relay message to b-cell

Helper T Cell Stimulates other cells to act

Killer T Cell Kills cancerous cells

Suppressor T Cell Slows down the production of b cells and t cells

Macrophage Big white blood cell Video link

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