...院 口腔颌面部发育/面部发育三）球状突的形成 胚胎第5周，中鼻突生长迅速，其末端出现两个球形 突起称球状突（globular process）。此时，面部发 育所需的突起已齐备。
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Led by George Daley of Children's Hospital in Boston, the researchers began their process by culturing mouse embryonic stem cells to form globular clusters called embryoid bodies.
NPR: Making Sperm, No Men Necessary
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