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blastocyst
释义
blastocyst
Encyclopedia
医学
胚胎发生
释
blastocyst
胚泡
受精后第4天左右,卵裂球增至约100个的囊泡状胚。卵裂细胞的分泌,使细胞团之间出现裂隙,后融合扩大形成中央的腔,周围由扁平的滋养层细胞包绕,腔的一端有一团内细胞群细胞。
Biology
blastocyst
胚囊,胚泡
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