Chorion: Difference between revisions

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Last update: Wednesday, 28 Dec 2022 at 1.06 pm.

Chorion is external fetal membrane (due to its appearance it is called "membrane villous"). From the inside, it is formed by extraembryonic mesoderm (subsequently it differentiates into mesenchyme, which then differentiates into fibrous layer), from the outside, it is formed by cytotrophoblast and syncitotrophoblast. It participates in the nutrition of the embryo, it is part of the fetal part of the placenta, villi and trophoblast lacunae. It creates the hormone hCG. From the second month of pregnancy, it is possible to take a sample from the chorion (through the vagina) for examination of the embryo (tissues are identical). During development, the chorion divides into two regions:

chorion frondosum − rich in villi, in the region of the embryonic pole, part of the future placenta;
chorion leave − it has degenerating villi, abembryonic pole, area outside the placenta.

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Externí odkazy

Amnion (anglická wikipedie)

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Kategorie:Slovník histologie a embryologie Kategorie:Histologie Kategorie:Embryologie

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-'''Chorion''' is '''external fetal membrane''' (due to its appearance it is called "membrane villous"). From the inside, it is formed by '''extraembryonal mesoderm''' (subsequently it differentiates into mesenchyme, which then differentiates into fibrous layer), from the outside, it is formed by '''cytotrophoblast''' and '''syncitotrophoblast'''. Podílí se na výživě zárodku, je součástí fetální časti [[placenta|placenty]], klků a lakun [[trofoblast]]u. Tvoří hormon [[hCG]]. Z choria je možné od 2. měsíce těhotenství odebrat vzorek (přes pochvu) na vyšetření zárodku (tkáně jsou identické). Během vývoje se chorion rozdělí na dvě oblasti:
+'''Chorion''' is '''external fetal membrane''' (due to its appearance it is called "membrane villous"). From the inside, it is formed by '''extraembryonic mesoderm''' (subsequently it differentiates into mesenchyme, which then differentiates into fibrous layer), from the outside, it is formed by '''cytotrophoblast''' and '''syncitotrophoblast'''. It participates in the nutrition of the embryo, it is part of the fetal part of the placenta, villi and trophoblast lacunae. It creates the hormone hCG. From the second month of pregnancy, it is possible to take a sample from the chorion (through the vagina) for examination of the embryo (tissues are identical). During development, the chorion divides into two regions:
-*'''chorion frondosum''' − bohaté na klky, v oblasti embryonálního pólu, součást budoucí placenty;
-*'''chorion leave''' − má degenerující klky, abembryonální pól, oblast mimo placentu.
+*'''chorion frondosum''' − rich in villi, in the region of the embryonic pole, part of the future placenta;
+*'''chorion leave''' − it has degenerating villi, abembryonic pole, area outside the placenta.<br />
 ==Odkazy==
 ===Související články===