What are the body systems that work together to defend the body against disease?
the immune system, lymphatic system, and cardiovascular system
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What is an allergy?
It is an abnormal reaction to a foreign substance .
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What is an acute disease?
It begins suddenly and lasts for a short time (colds, flu)
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What is chronic disease?
It lasts for a long time and/or recurs frequently (cancer, arthritis, diabetes)
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What is the lymphatic system?
a major component of the immune system that protects the body from pathogens
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It is a rounded mass of tissue that filters fluids from other body tissues and traps pathogens.
lymph node
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The body's ability to protect itself from pathogens before they cause disease
Immunity
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The type of immunity in which the immune system produces antibodies in response to the presence of a pathogen. It can last a few years or up to a lifetime