The inpocketed vegetal pole cells develop into a sheet of cells which grows upward and eventually encloses a cavity, the archenteron.
内褶的植物极胞
一片向上
长的
胞,并最后围
一个腔,即原肠。
The inpocketed vegetal pole cells develop into a sheet of cells which grows upward and eventually encloses a cavity, the archenteron.
内褶的植物极胞
一片向上
长的
胞,并最后围
一个腔,即原肠。
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