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Why do we need an immune system?
Over colonisation by many different organisms - failure of organ systems - death
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What is the innate immune system and what does it do?
Non-specific immunity - defences present at birth - no specific recognition of microbes
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What physical and chemical barriers are form part of the innate immune system?
Skin, cillia, secretions, mucus membranes
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What cells types are involved in the innate immune system and what do they do?
Natural killer cells, neutophils, macrophages, basophils - attack and destroy, remove from body (inflammation, fever, secretions)
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What is haematopoiesis and where does it occur?
Formation of new blood cells - bone marrow; skull, sternum, vertebrae, pelvis and upper thigh bones
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What is the lymphatic system?
Three functions: drains excess interstitial fluid, transports dietary lipid, carries out immune response
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What are primary and secondary lymphoid organs?
Primary: bone marrow and thymus. Secondary: adenoids, tonsils, lymph nodes, spleen, Peyer's patches, appendix
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What does the thymus gland do?
Development of T cells (white blood cell). T cells defend the body from pathogens.
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What does the spleen do?
Filters old and dying red blood cells. Stores platelets to help in coagulation and clotting. White blood cells that are stored in the spleen migrate to the injury sites and transform into messenger cells that remove of dying or dead cells, and heal w
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What do lymph nodes do?
Filter and trap foreign particles - contain lymphocytes,
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Card 2

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What is the innate immune system and what does it do?

Back

Non-specific immunity - defences present at birth - no specific recognition of microbes

Card 3

Front

What physical and chemical barriers are form part of the innate immune system?

Back

Preview of the front of card 3

Card 4

Front

What cells types are involved in the innate immune system and what do they do?

Back

Preview of the front of card 4

Card 5

Front

What is haematopoiesis and where does it occur?

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Preview of the front of card 5
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