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Yolk plug


Yolk plug
A mass of large, yolky endoderm cells that fill the blastopore of an amphibian gastrula during its late stages.
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yolk plug The large yolk-filled cells that protrude from beneath the ectoderm at the blastopore of the amphibian gastrula.
yolk sac The stored food reserve (yolk) and its surrounding membranes, which is found in embryonic reptiles, birds, and mammals.
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yolk plug - a patch of vegetal cells (endoderm) that remains exposed in the blastopore after the formation of the ventral lip during gastrulation.
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yolk plug
In amphibians, when the opening of the archenteron, the blastopore, is filled with yolk-rich cells, it is called the yolk plug.
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