胚胎第7周时，发育中的腭由原发腭（ primary palate）组成，原发腭由中鼻突融合而形成。在原发腭的后方，鼻隔向下生长在口鼻腔之间形成两个连接孔，即原发性的鼻后孔。
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以上来源于: WordNet
Results: The trisomy with cleft palate mouse foetuses had significantly developmental hypoplasia in the primary palatal shelves.
结果：该模型虽无原发腭裂却伴有原发腭的发育不足；
Primary, complete and middle cleft palate were all combined with cleft lips.
原发、完全及正中腭裂全部合并唇裂。
A primary clinical study proves that repairing of the hard palate cleft can improve the velopharyngeal function.
初步研究认为腭板骨缺损修复能改善腭咽闭合。
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