Table 4 |
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Overview of the defining features of innate and adaptive immunity [1]. |
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Innate immune system |
Adaptive immune system |
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Cells |
Hematopoietic cells: • macrophages • dendritic cells • mast cells • neutrophils • basophils • eosinophils • NK cells • T cells • non-hematopoietic cells • epithelial cells (skin, airways, gastrointestinal tract) |
Hematopoietic cells: • T cells • B cells |
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Molecules |
cytokines • complement • proteins and glycoprotein |
antibodies (Ig) • cytokines |
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Response time |
immediate |
delayed by hours to days |
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Immunologic memory |
none: responses are the same with each exposure |
responsiveness enhanced by repeated antigen exposure |
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Warrington et al. Allergy, Asthma & Clinical Immunology 2011 7(Suppl 1):S1 doi:10.1186/1710-1492-7-S1-S1 |
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