hematopoiesis

(redirected from fetal hematopoiesis)
Also found in: Dictionary, Thesaurus, Encyclopedia.

hematopoiesis

 [he″mah-to-poi-e´sis]
the formation and development of blood cells. In the embryo and fetus it takes place in a variety of sites including the liver, spleen, thymus, lymph nodes, and bone marrow; from birth throughout the rest of life it is mainly in the bone marrow with a small amount occurring in lymph nodes. Called also hematogenesis, hemogenesis, and hemopoiesis.
extramedullary hematopoiesis the formation and development of blood cells outside the bone marrow, as in the spleen, liver, and lymph nodes.

he·mo·poi·e·sis

(hē'mō-poy-ē'sis),
The process of formation and development of the various types of blood cells and other formed elements.Synonym(s): hematosis (1)
[hemo- + G. poiēsis, a making]

hematopoiesis

/he·ma·to·poi·e·sis/ (-poi-e´sis) the formation and development of blood cells.
extramedullary hematopoiesis  that occurring outside the bone marrow, as in the spleen, liver, and lymph nodes.

hematopoiesis

(hē′mə-tō-poi-ē′sĭs, hĭ-măt′ə-) also

hemopoiesis

(hē′mə-poi-ē′sĭs)
n.
The formation of blood or blood cells in the body.

he′ma·to·poi·et′ic (-ĕt′ĭk) adj.

hematopoiesis

[hē′mətōpō·ē′sis, hem′-]
Etymology: Gk, haima + poiein, to make
the normal formation and development of blood cells in the bone marrow. In severe anemia and other hematologic disorders, cells may be produced in organs outside the marrow (extramedullary hematopoiesis). See also erythropoiesis. hematopoietic, adj.

he·mo·poi·e·sis

(hē'mō-poy-ē'sis)
The process of formation and development of the various types of blood cells and other formed elements.
Synonym(s): hematogenesis, hematopoiesis, hemogenesis, sanguification, haemopoiesis.
[hemo- + G. poiēsis, a making]

he·mo·poi·e·sis

(hē'mō-poy-ē'sis)
Process of formation and development of various types of blood cells and other formed elements.
Synonym(s): hematopoiesis, hematosis (1) , haemopoiesis.
[hemo- + G. poiēsis, a making]

hematopoiesis (hē´mətō´poiē´sis),

n the normal formation and development of blood cells in the bone marrow.

hematopoiesis

the formation and development of blood cells, usually taking place in the bone marrow.

cyclic hematopoiesis of collies
see canine cyclic hematopoiesis.
hematopoiesis depression
a significant finding in cases of endotoxemia.
extramedullary hematopoiesis
the formation of and development of blood cells outside the bone marrow, as in the spleen, liver and lymph nodes.
fetal hematopoiesis
in embryogenesis migration of stem cells from the yolk sac blood islands sets up hematopoiesis in thymus, lymph nodes, liver and spleen. When fetal bone develops a marrow cavity hematopoiesis is similarly established. At birth hematopoiesis is largely medullary.
regenerative hematopoiesis
increased hematopoietic activity in response to a need for more cells; indicated by the presence of a higher than normal proportion of immature forms in the peripheral blood.