Haematopoiesis

Haematopoiesis (; from Ancient Greek (haîma)'blood' and (poieîn)'to make'; also hematopoiesis in US English, sometimes h(a)emopoiesis) is the formation of blood cellular components. All cellular blood components are derived from haematopoietic stem cells. In a healthy adult human, roughly ten billion (10) to a hundred billion (10) new blood cells are produced per day, in order to maintain steady state levels in the peripheral circulation.