囊胚腔,卵裂腔
These orient themselves so that a fluid-filled cavity, the blastocoel, forms inside the mass of cells. 这些细胞进行自我调整,以致在细胞群内部形成一个充满液体的腔,即囊胚腔。
囊胚腔,卵裂腔,胚泡腔