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Table 4 Overview of the defining features of innate and adaptive immunity [1].

From: An introduction to immunology and immunopathology

  Innate immune system Adaptive immune system
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
Molecules cytokines
• complement
• proteins and glycoprotein
antibodies (Ig)
• cytokines
Response time immediate delayed by hours to days
Immunologic memory none: responses are the same with each exposure responsiveness enhanced by repeated antigen exposure