Components of the innate immune system
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Skin and mucous membranes (epithelial cells)
Mechanical and Chemical defenses
Phagocytic cells (neutrophils, macrophages)
Ingest and kill bacteria and fungi
Proinflammatory cells (macrophages, mast cells, eosinophils, basophils and platelets)
Induce host defenses and inflammation.
Natural killer cells
Kill virus-infected cells and tumor cells
Antigen-presenting cells (dendritic cells, macrophages)
- Recognize, process, and present antigens to lymphocytes.
- Initiate adaptive immune responses.
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