Changes

[[Image:LH_Variety_blood_cells_Histology.jpg|right|thumb|200px|<p>'''Blood cells'''</p>^{©RVC 2008}]]

[[Image:LH_Variety_blood_cells_Histology.jpg|right|thumb|210px|<p>'''Blood cells'''</p>^{©RVC 2008}]]

==Introduction==

==Introduction==

Haematopoiesis is also known as haemopoiesis or hemopoiesis and describes the process of blood cell formation. All blood cells are derived from the initial pluripotent stem cell (PPSC) which gives rise to colony forming units (CFUs). These CFUs further differentiate to give rise to their final stage of development where they become the various forms of blood cells or those cells which migrate from the circulation into tissues, such as mast cells and macrophages.

Haematopoiesis is also known as haemopoiesis or hemopoiesis and describes the process of blood cell formation. All blood cells are derived from the initial pluripotent stem cell (PPSC) which gives rise to colony forming units (CFUs). These CFUs further differentiate to give rise to their final stage of development where they become the various forms of blood cells or those cells which migrate from the circulation into tissues, such as mast cells and macrophages.

==Development==

==Development==

[[Image:LH_Avian_Variety_blood_cells_Histology.jpg|right|thumb|200px<p>'''Avian Blood cells'''</p>^{©RVC 2008}]]

[[Image:LH_Avian_Variety_blood_cells_Histology.jpg|right|thumb|210px<p>'''Avian Blood cells'''</p>^{©RVC 2008}]]

<p>PPSC’s initially divide and differentiate into multipotential haematopoietic stem cells. Multipotential haematopoietic stem cells only have the ability to mature into a single cell lineage, either myeloid progenitors (granulocytes, erythroblasts, [[Macrophages|macrophages]] and megakaryocytes) or lymphoid progenitors. The development of blood cells from the multipotential haematopoietic stem cell into the final mature cell is categorised into:

<p>PPSC’s initially divide and differentiate into multipotential haematopoietic stem cells. Multipotential haematopoietic stem cells only have the ability to mature into a single cell lineage, either myeloid progenitors (granulocytes, erythroblasts, [[Macrophages|macrophages]] and megakaryocytes) or lymphoid progenitors. The development of blood cells from the multipotential haematopoietic stem cell into the final mature cell is categorised into: