At each interval, they counted cells that were dividing in the ependymal layer. 每次检测，他们对室管膜层的细胞计数。
Brain ventricles are hollow chambers filled with fluid that supports brain tissue, and a layer of ependymal cells lines these ventricles. 脑室是中空结构，充满脑脊液以支持脑组织，且脑室周围排列着一层室管膜细胞。
