Immune System fights against microbes and prevent their entry inside the body.
Innate Immune System is composed of cells and proteins that are always present and are ready to fight against microbes in the infection area. Innate Immune System is present from the time of our birth.
Main elements of the innate immune system are –
- Dendritic cells.
- Phagocytic leukocytes.
- Natural killer (NK) cell.
- Physical epithelial barriers.
- Circulating plasma proteins.
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