The Immune System
Locking the Pathogens Out The 5 Barriers: Skin Tears Saliva Mucous Membranes Stomach Acid How do these barriers keep Pathogens out? Locking the Pathogens Out
When Pathogens invade the body, multiply, and harm some of your body cells. Infection?
What is your immune system good for? A combination of body defenses made up of cells, tissues, and organs that fight pathogens in the body. What is your immune system good for?
Non-Specific Immune Response Why is an immune response non-specific? Non-Specific Immune Response
1st step for Non-specific immune response: Inflammation The body’s response to injury or disease. Swelling, pain, and heat. 1st step for Non-specific immune response: Inflammation
2nd step for Non-specific immune response: Fever Higher body temperature makes it more difficult for pathogens to multiply Increases the number of white blood cell production. 2nd step for Non-specific immune response: Fever
The Specific Immune Response Lymphatic System- a second circulatory system Helps move white blood cells around the body
B cells T cells NK cells Lymphocytes
Antigens Attach to a pathogen Body senses; reacts by producing more B and T cells Antigens
Antibodies Made by B cells Attach to Antigens faster reducing the rate of infection. Programmed to fight a particular pathogen Antibodies
Like antibodies respond quickly to a pathogen. Memory B and T cells
Identify Pathogen and stimulate production of B cells. Helper T cells
Attach to antigens and kill the pathogen. Killer T cells
The ability to resist pathogens that you have previously come into contact with Immunity
Immune Response
A dead or weakened pathogen introduced into the body to create an immune response This response produces an immunity to that pathogens specific antigens. Vaccines
Recommend Ages for vaccinations