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Что (кто) такое extraembryonic coelom - определение
CAVITY OF FLUID SURROUNDING AN EMBRYO
Gestation sac; Chorionic cavity; Extra-embryonic coelom; Gestational Sac Diameter; Extraembryonic coelom; Gestational sacs; Pregnancy sac
![A: Gestational sac, B: [[Crown-rump length]] of embryo, C: [[Amniotic sac]], D: [[Yolk sac]]](https://commons.wikimedia.org/wiki/Special:FilePath/Gestational sac.svg?width=200 "A: Gestational sac, B: [[Crown-rump length]] of embryo, C: [[Amniotic sac]], D: [[Yolk sac]]")
Gestational sac
The gestational sac is the large cavity of fluid surrounding the embryo. During early embryogenesis it consists of the extraembryonic coelom, also called the chorionic cavity.
Intraembryonic coelom
INTRAEMBRYONIC MESODERM
Coeloma intraembryonicum; Intra-embryonic coelom; Somatic coelom
In the development of the human embryo the intraembryonic coelom (or somatic coelom) is a portion of the conceptus forming in the mesoderm during the third week of development. During the third week of development, the lateral plate mesoderm splits into a dorsal somatic mesoderm (somatopleure) and a ventral splanchnic mesoderm (splanchnopleure).
Body cavity
INTERNAL SPACE WITHIN A MULTICELLULAR ORGANISM
Pseudocoelom; Pseudocoeolomate; Coelomates; Body cavities; Celom; Coelomic; Intraembryonic cavity; Human body cavities; Acelomate; Dorsal cavity; Coelome; Human body cavity; Acoelous; Perigastrium; Aceolomate; Cavitas; Cavum
A body cavity is any space or compartment, or potential space, in an animal body. Cavities accommodate organs and other structures; cavities as potential spaces contain fluid.
Википедия
Gestational sac
The gestational sac is the large cavity of fluid surrounding the embryo. During early embryogenesis it consists of the extraembryonic coelom, also called the chorionic cavity. The gestational sac is normally contained within the uterus. It is the only available structure that can be used to determine if an intrauterine pregnancy exists until the embryo can be identified.
On obstetric ultrasound, the gestational sac is a dark (anechoic) space surrounded by a white (hyperechoic) rim.
