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The Morula and Blastocyst


5 days

From The Biology of Prenatal Development.Buy Now

Script: 到受精後的第3至4天, 胚胎分裂的細胞 呈現球形, 胚胎稱為桑椹胚。

到受精後的第4至5天, 細胞球內形成一個腔, 這時的胚胎稱為胚泡。

胚泡內部的細胞 稱為內細胞群, 形成發育中的人的頭、身體 和其它重要結構。

All ages referenced to fertilization, not last menstrual period.
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Fertilization 2
Fertilization 2
Cell Division
Cell Division
The Morula and Blastocyst
The Morula and Blastocyst
3 Billion Base Pairs per Cell
3 Billion Base Pairs per Cell
Amnion and Germ Layers
Amnion and Germ Layers
Early Embryonic Development
Early Embryonic Development
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