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Diagram showing the development of different blood cells from haematopoietic stem cell to mature cells. Haematopoiesis (/ h ɪ ˌ m æ t ə p ɔɪ ˈ iː s ɪ s, ˌ h iː m ə t oʊ-, ˌ h ɛ m ə-/; [1] [2] from Ancient Greek αἷμα (haîma) 'blood' and ποιεῖν (poieîn) 'to make'; also hematopoiesis in American English, sometimes h(a)emopoiesis) is the formation of blood cellular ...
The haematopoietic system (spelled hematopoietic system in American English) is the system in the body involved in the creation of the cells of blood. [1] Structure
Hematopoietic stem cells (HSCs) are the stem cells [1] that give rise to other blood cells.This process is called haematopoiesis. [2] In vertebrates, the first definitive HSCs arise from the ventral endothelial wall of the embryonic aorta within the (midgestational) aorta-gonad-mesonephros region, through a process known as endothelial-to-hematopoietic transition.
Myeloid neoplasms always concern bone marrow cell lineage and are related to hematopoietic cells. Myeloid tissue can also be present in the liver and spleen [ 5 ] in fetuses , and sometimes even in adults as well, which leads to extramedullary hematopoiesis .
The following is the chart of the International Phonetic Alphabet, a standardized system of phonetic symbols devised and maintained by the International Phonetic Association. It is not a complete list of all possible speech sounds in the world's languages, only those about which stand-alone articles exist in this encyclopedia.
The American Heritage Dictionary of the English Language (abbreviated AHD) uses a phonetic notation based on the Latin alphabet to transcribe the pronunciation of spoken English. It and similar respelling systems, such as those used by the Merriam-Webster and Random House dictionaries, are familiar to US schoolchildren.
A hemocytoblast, a multipotent hematopoietic stem cell, becomes; a common myeloid progenitor or a multipotent stem cell, then; a unipotent stem cell, then; a pronormoblast (also commonly called an proerythroblast or a rubriblast), then; a basophilic or early normoblast (also commonly called an erythroblast), then
The latest official IPA chart, revised in 2020. Here is a basic key to the symbols of the International Phonetic Alphabet. For the smaller set of symbols that is sufficient for English, see Help:IPA/English. Several rare IPA symbols are not included; these are found in the main IPA article or on the extensive IPA chart.