The vacuolated cells had larger and more invaginating plasmalemma than those in the meristemate cells.
液胞化细胞中的质膜内陷数量多,体积增大。
By 13 days 5 minutes after coitus, the head process invaginating in the primitive pit move straight forward in cephalic derection to form the notochordal cord.
交配后13时5分,原窝底部的头突向前延伸形成管索管。
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