Hematopoietic cells are immature or developing blood cells. Most hematopoietic cells are found in bone marrow, a specialized type of tissue at the centre of a bone. Hematopoietic cells can also be found in the liver and spleen.
There are three main types of hematopoietic cells and each produce a different group of blood cells. All of the blood cells that come from a single type of hematopoietic cell are called a “lineage”.
The three lineages of hematopoietic cells are:
Cells from all three lineages are found in a normal, healthy bone marrow.