Development of a placental blood circulation in rat embryos in vitro.
J Embryol Exp Morphol
; 37(1): 227-35, 1977 Feb.
Article
em En
| MEDLINE
| ID: mdl-870593
ABSTRACT
Rat embryos explanted with their membranes at head-fold stage (9 1/2 days gestation) formed an allantoic placenta which enlarged in culture and developed a foetal blood circulation. Embryos explanted at early somite stages (10 1/2 days) also formed a growing allantoic placenta but only after removal of most of the ectoplacental trophoblast. Assays of total protein in the embryo and placenta suggested that, in the absence of a maternal blood circulation to the placenta, embryo and placenta compete for the respiratory and nutritional resources obtained through the yolk-sac.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Placenta
/
Embrião de Mamíferos
Limite:
Animals
Idioma:
En
Revista:
J Embryol Exp Morphol
Ano de publicação:
1977
Tipo de documento:
Article