microscopic view of a blastula during pregnancy. after the cleavage has produced over 100 cells, the embryo is called a blastula. - 人類囊胚 幅插畫檔、美工圖案、卡通及圖標
microscopic view of a blastula during pregnancy. after the cleavage has produced over 100 cells, the embryo is called a blastula. - 人類囊胚 幅插畫檔、美工圖案、卡通及圖標細胞