常見例句meroblastic Type of cleavage in which only the blastodisc undergoes division. 不完全卵裂只有胚盤歷經(jīng)卵裂的過程。yolk cell A giant syncytial uncleaved cell containing the yolk. It underlies the blastodisc early in development and becomes enveloped by the blastoderm during epiboly. 卵黃細(xì)胞龐大的融合不分裂細(xì)胞，包含卵黃的。發(fā)育早期它在胚盤之下，外包時期變成藉由囊胚包裹。vegetal pole Opposite to the animal pole on the egg. Later in embryonic development corresponds to the point on the yolk cell furthest from the developing blastodisc. 植物極在卵上位于動物極對面。稍后胚胎發(fā)育在卵黃細(xì)胞上與發(fā)展中的胚盤最遠(yuǎn)的一點(diǎn)。chick blastodisc cell 雞胚盤細(xì)胞blastodisk 胚盤 返回 blastodisc