The fetal cells transformed into what seem like neurons, astrocytes (which help to feed neurons), oligodendrocytes (which insulate neurons) and macrophages (which ingest germs and damaged cells).

• 可以转化为神经元细胞、星形胶质细胞（可为神经元细胞提供养分），少突胶质细胞（可分隔神经元细胞）、巨噬细胞（可吞噬消化细菌和受损细胞）。