Haematopoiesis may occur in other organs particularly the spleen, less frequently the liver and even peripheral lymph nodes, if there is a marked increase in demand for cells. With increased tissue demands, mature reserves are depleted and immature cells are released into the circulation. | Haematopoiesis may occur in other organs particularly the spleen, less frequently the liver and even peripheral lymph nodes, if there is a marked increase in demand for cells. With increased tissue demands, mature reserves are depleted and immature cells are released into the circulation. |