Immune System

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What is the immune system?

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The immune system is the body's defense system against infections and diseases, consisting of various cells, tissues, and organs that work together to protect the body.

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What are pathogens?

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Pathogens are microorganisms such as bacteria, viruses, fungi, and parasites that can cause disease.

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True or false: Sneezes and coughs help your body to get rid of pathogens.

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True

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What is an allergen?

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An allergen is any substance that can cause an allergic reaction in the body.

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How do germs enter the body?

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Germs can enter the body through touching mucous membranes, not washing hands, or touching your face.

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What is the role of white blood cells?

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White blood cells are crucial components of the immune system that help fight infections by attacking and destroying pathogens.

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What is an involuntary action?

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An involuntary action is a body function that occurs automatically without conscious control, such as breathing or heartbeat.

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What is the difference between an irritant and an allergen?

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An irritant causes discomfort or inflammation, while an allergen triggers an immune response leading to allergic reactions.

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What is the function of antibodies?

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Antibodies are proteins produced by the immune system to identify and neutralize foreign objects like bacteria and viruses.

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What is vaccination?

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Vaccination is the process of introducing a harmless form of a pathogen into the body to stimulate the immune system to build immunity.