Template:Gilmour1941 table1: Difference between revisions
From Embryology
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|+ colspan=5| '''Stages of Erythropoiesis''' | |+ colspan=5| '''Stages of Erythropoiesis''' | ||
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! Stage of development | ! Stage of development | ||
! Within embryo or extra-embryonic tissues | ! Within embryo or extra-embryonic tissues | ||
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| Primitive | | Primitive | ||
| Megaloblastic | | Megaloblastic | ||
|- | |-bgcolor="F5FAFF" | ||
| From establishment of circulation (about 2-5 mm | | From establishment of circulation (about 2-5 mm) to 9 mm. | ||
| In general circulation (of embryo, yolk sac and chorion) | | In general circulation (of embryo, yolk sac and chorion) | ||
| Intravascular except for continued multiplication of cells in hemorrhages | | Intravascular except for continued multiplication of cells in hemorrhages | ||
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| Megaloblastic | | Megaloblastic | ||
|- | |- | ||
| 10 mm | | 10 mm up to less than 48 mm. | ||
| In embryo, yolk sac and general circulation | | In embryo, yolk sac and general circulation | ||
| Intra- and extra~vascular (marrow first in 57 mm | | Intra- and extra~vascular (marrow first in 57 mm embryo) | ||
| Partly primitive, partly definitive in general circulation; definitive elsewhere | | Partly primitive, partly definitive in general circulation; definitive elsewhere | ||
| Megaloblastic | | Megaloblastic | ||
|- | |-bgcolor="F5FAFF" | ||
| 48 mm to between 15 and 21 days after birth | | 48 mm to between 15 and 21 days after birth | ||
| | | Intracorporeal in many organs and tissues | ||
| Extravascular, except sinuses of liver spleen and multiplication of cells in circulation (70 - 160 mm.) | | Extravascular, except sinuses of liver spleen and multiplication of cells in circulation (70 - 160 mm.) | ||
| Definitive | | Definitive | ||
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|- | |- | ||
| 21 days or more after birth | | 21 days or more after birth | ||
| | | Intracorporeal in marrow only | ||
| Extravascular | | Extravascular | ||
| | | Definitive | ||
| Normoblastic | | Normoblastic | ||
|} | |}<noinclude>[[Category:Template]][[Category:Table]][[Category:Blood]][[Category:Historic Embryology]]</noinclude> |
Latest revision as of 01:49, 17 May 2018
Stage of development | Within embryo or extra-embryonic tissues | Within or outside vessels | Haemopoietic family | Type of erythropoiesls |
---|---|---|---|---|
Jones-Brewer presomite embryo till establishment of circulation (about 2.5 mm) | In blood islands in yolk sac, in some of cases in body stalk in the chorion or ' the embryo | Intravascular: possibly extravascular in body stalk in a few cases | Primitive | Megaloblastic |
From establishment of circulation (about 2-5 mm) to 9 mm. | In general circulation (of embryo, yolk sac and chorion) | Intravascular except for continued multiplication of cells in hemorrhages | Primitive | Megaloblastic |
10 mm up to less than 48 mm. | In embryo, yolk sac and general circulation | Intra- and extra~vascular (marrow first in 57 mm embryo) | Partly primitive, partly definitive in general circulation; definitive elsewhere | Megaloblastic |
48 mm to between 15 and 21 days after birth | Intracorporeal in many organs and tissues | Extravascular, except sinuses of liver spleen and multiplication of cells in circulation (70 - 160 mm.) | Definitive | Partly megaloblastic, partly megalo-normoblastic (48-190 mm.); partly megaloblastic, partly normoblastic (190 mm. onwards) |
21 days or more after birth | Intracorporeal in marrow only | Extravascular | Definitive | Normoblastic |