单词cephalic flexure
un.: 头曲网络: 颅屈曲；附送一个片头曲
头曲
The embryonic body flexed and turned around, and then cephalic flexure, cervical flexure and dorsal flexure emerged at the 7th stage;
第7期胚体发生了屈曲与扭转，出现了头曲、颈曲和背曲；