Couverture de Yolk Sac
Titre du livre:

Yolk Sac

Betascript Publishing (24-07-2010 )

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ISBN-13:

978-613-2-13136-2

ISBN-10:
6132131361
EAN:
9786132131362
Langue du livre:
Anglais
texte du rabat:
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The yolk sac is a membranous sac attached to an embryo, providing early nourishment in the form of yolk in bony fishes, sharks, reptiles, birds, and primitive mammals. It functions as the developmental circulatory system of the human embryo, before internal circulation begins. It is the first element seen in the gestational sac during pregnancy, usually at 5 weeks gestation. It is a critical landmark, identifying a true gestation sac. It is reliably seen early in human pregnancy using ultrasound. The yolk sac is situated on the ventral aspect of the embryo; it is lined by extra-embyronic endoderm, outside of which is a layer of extra-embryonic mesenchyme, derived from the mesoderm.
Maison d'édition:
Betascript Publishing
Site Web:
https://www.betascript-publishing.com/
Edité par:
Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
Numéro de pages:
68
Publié le:
24-07-2010
Stock:
Disponible
Catégorie:
Biologie
Prix:
182.12 R$
Mots-clés:
SAC, Embryo, Yolk, Erythropoiesis, Human Embryo

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