Question:
The remaining yolk sac regresses as the ____ expands, and the role of the ____ circulation is soon superseded by the ____ circulation. The yolk sac is reduced to a diameter of 1 cm by day ____ and has completely disappeared at partus. The vitelline duct closes on about day ____.
Author: Magdalena BadenhorstAnswer:
Allantois vitelline umbilical 58 70
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