Lesson Flashcards: Components of the Human Immune System

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Definition

Cytokine

A chemical messenger that functions in communication between cells of the immune system

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Definition

Antibody (immunoglobulin, Ig)

A globular protein produced by B lymphocytes that is adapted to bind with a specific antigen

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Definition

Immune system

A collection of organs, tissues, cells, and chemicals that work together to prevent illness

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Definition

Red bone marrow

Tissue found inside flat bones and in the ends of long bones that generates red and white blood cells

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Definition

Neutrophil

A type of granulocyte, a phagocytic cell, that engulfs and destroys pathogens in the immune response

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Definition

Lymph node

A small organ that is found at junctures throughout the lymphatic system and houses mature and immature immune cells and filters the lymph fluid

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Definition

Peyer’s patches

Clusters of immune cells located in the lower small intestine

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Definition

Tonsils

Immune organs in the throat that trap pathogens that might enter our body from the air we breathe and the food we eat

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Definition

Thymus

An organ in the chest cavity that has both endocrine and immune functions

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