The following points highlight the seven important cells of immune system. The cells are: 1. Hematopoietic Stem Cell 2. Lymphocytes 3. Monocytes 4. Macrophages 5. Granulocytes 6. Dendritic Cells 7. Mast Cells. Cell # 1. Hematopoietic Stem Cell: All blood cells arise from a type of cell called hematopoietic stem cell (HSC) (or stem cell). […]