A blastopore is an opening into the archenteron during the embryonic stages of an organism. The distinction between protostomes and deuterostomes is based on the direction in which the mouth (stoma) develops in relation to the blastopore.
例句与用法
1.
Only the dorsal lip of the blastopore could induce altered development in the host . 只有胚孔的背唇能够诱导宿主发育的改变。
2.
Some brown chromatophores appeared in about 18h . the blastopore closed in 22h20min 18小时左右，出现褐色点状色素胞， 22小时20分胚孔关闭。
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