production of red blood cells.
This term describes the process of blood cell development in the marrow. The most undeveloped cells in the marrow are stem cells. They start the process of blood cell development. The stem cells begin to develop into young or immature blood cells like red cells or white cells of various types. This process is called “differentiation.” The young or immature blood cells then further develop into fully functional blood cells. This process is called “maturation.” The cells then leave the marrow and enter the blood and circulate throughout the body. Hematopoiesis is a continuous process that is active normally throughout life. The reason for this continuous activity is that most blood cells live for short periods and must be continuously replaced. After release from the marrow, red cells are removed in four months, platelets in 10 days and most neutrophils in one to three days. About five hundred billion blood cells are made each day. This requirement for very rapid replacement explains the severe deficiency in blood cell counts when the marrow is injured by replacement with leukemia, lymphoma or myeloma cells.
The formation of blood or of blood cells in the living body normally in the bone marrow. Tissues which produce blood cells are said to be hematopoietic.
The process of forming blood cells - red blood cells, white blood cells and platelets.
Formation of specialized blood cells from precursor cells
The process of blood development in the bone marrow.
the process by which blood cells are produced in the bone marrow. Hematopoietic stem cells give rise to all types of red and white blood cells.
The formation and development of blood cells.
Hematopoiesis is the formation of blood cells.
The forming of new blood cells.
Development of blood cells including immune cells in the bone marrow
The production of blood cells.
The process of formation, development, and differentiation of the formed elements of whole Blood.