erythropoiesis - meaning and definition. What is erythropoiesis
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What (who) is erythropoiesis - definition

PROCESS WHICH PRODUCES RED BLOOD CELLS
Erythropoesis; Erythropoeisis; Erythropoietic; Erythrocyte Differentiation; Erythroid Differentiation

erythropoiesis         
[??r??r?(?)p??'i:s?s]
¦ noun Physiology the production of red blood cells.
Derivatives
erythropoietic adjective
Latent iron deficiency         
IRON DEFICIENCY WITHOUT ANEMIA
Iron-deficient erythropoiesis; Latent Iron Deficiency
Latent iron deficiency (LID), also called iron-deficient erythropoiesis, is a medical condition in which there is evidence of iron deficiency without anemia (normal hemoglobin level). It is important to assess this condition because individuals with latent iron deficiency may develop iron-deficiency anemia.
Ineffective erythropoiesis         
Ineffective erythropoiesis is active erythropoiesis with premature death of red blood cells, a decreased output of RBCs from the bone marrow, and, consequently, anemia.

Wikipedia

Erythropoiesis

Erythropoiesis (from Greek 'erythro' meaning "red" and 'poiesis' "to make") is the process which produces red blood cells (erythrocytes), which is the development from erythropoietic stem cell to mature red blood cell.

It is stimulated by decreased O2 in circulation, which is detected by the kidneys, which then secrete the hormone erythropoietin. This hormone stimulates proliferation and differentiation of red cell precursors, which activates increased erythropoiesis in the hemopoietic tissues, ultimately producing red blood cells (erythrocytes). In postnatal birds and mammals (including humans), this usually occurs within the red bone marrow. In the early fetus, erythropoiesis takes place in the mesodermal cells of the yolk sac. By the third or fourth month, erythropoiesis moves to the liver. After seven months, erythropoiesis occurs in the bone marrow. Increased levels of physical activity can cause an increase in erythropoiesis. However, in humans with certain diseases and in some animals, erythropoiesis also occurs outside the bone marrow, within the spleen or liver. This is termed extramedullary erythropoiesis.

The bone marrow of essentially all the bones produces red blood cells until a person is around five years old. The tibia and femur cease to be important sites of hematopoiesis by about age 25; the vertebrae, sternum, pelvis and ribs, and cranial bones continue to produce red blood cells throughout life. Up to the age of 20 years, RBCs are produced from red bone marrow of all the bones (long bones and all the flat bones). After the age of 20 years, RBCs are produced from membranous bones such as vertebrae, the sternum, ribs, scapulas, and the iliac bones. After 20 years of age, the shaft of the long bones becomes yellow bone marrow because of fat deposition and loses the erythropoietic function.

Comparison of erythrocyte production by marrow stem cell lines from old and young adult donors shows no significant differences. This finding implies that little or none of the proliferative capacity of the erythropoietic stem cells is exhausted by a lifetime of normal functioning.

Examples of use of erythropoiesis
1. Continuous Erythropoiesis Receptor Activator (CERA) is a new anemia treatment for kidney failure cases that will be soon launched in the Kingdom, according to Dr.