移植后29～32h，靠近神经管的DC体节向中壁破裂，外迁的间充质细胞在生肌节与神经管和脊索之间，形成生骨节（即原位生骨节）。
After 29-32 h of grafting , the medial wall of DC somite was broken down and migrating mesenchymal cells moved toward notochord and formed sclerotome ( the sclerotome in situ ) between myotomes and neural tube as well as notochord .
生肌节