Figure 1.

Hematopoiesis is the process by which all the blood cell types are produced through differentiation from increasingly lineage-committed precursor cells in the adult BM. Broadly, the cells can be classified as myeloid or lymphoid in origin. The myeloid lineage gives rise to thrombocytes (platelets), erythrocytes, granulocytes (mast cells, basophils, neutrophils, eosinophils), macrophages, and myeloid-derived dendritic cells (DCs). The lymphoid lineage produces T- and B-lymphocytes, natural killer (NK) cells, and lymphoid DCs.