Number one, there is such a thing as a skeletal stem cell -- a skeletal stem cell that builds up the entire vertebrate skeleton, bone, cartilage and the fibrous elements of skeleton, just like there's a stem cell in blood, just like there's a stem cell in the nervous system.
一つ目は 骨格幹細胞というものの存在 骨格幹細胞は全脊椎、骨、軟骨や 骨格の線維を形成します ちょうど血液の幹細胞や 神経系の幹細胞があるように