primary ossification center

Observation of primary ossification center of fetal cranium viscerale

胎儿面颅骨初级骨化中心的观察

Objective To observe the occurring time of the primary ossification center of the fetus ' cranium viscerale .

目的观察胎儿面颅骨初级骨化中心出现的时间顺序。

It was concluded that the cartilage canals of fetus play great roles in formation of secondary ossification center and exist in primary secondary ossification center .

说明胎儿股骨远端次级骨化中心初始时其内存在软骨管，软骨管对次级骨化中心的形成起作用。