early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
双语例句
1. It enter the late blastula stage in 6 h 50 min.
6小时50分进入低囊胚期.
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2. The cells of the blastula , called blastomeres, also each receive a full diploid set of chromosomes.
这些囊胚细胞, 称卵裂球, 每个细胞都有一套二倍体染色体组.
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3. The outer layer of a blastula that gives rise to the ectoderm after gastrulation.
外胚层囊胚的外层,在原肠胚形成之后生后外胚层组织.
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4. However , content of the dissolvable protein and amino acid during gastrula stage during blastula stage.
总氨基酸含量在胚胎发育早期下降较快, 胚胎发育至后无节幼体期氨基酸含量下降幅度变缓.
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用作名词 (n.)
The cells of the blastula, called blastomeres, also each receive a full diploid set of chromosomes. 这些囊胚细胞，称卵裂球，每个细胞都有一套二倍体染色体组。
Cleavage produces a blastula, a sheet of cells rounded into a sphere that in most species surrounds a cavity. 卵裂产生一个囊胚，形成的细胞壁球形排列形成一个空腔。
