单词：blastula
音标：['blæstjulә] ；
n. 囊胚
n. 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
词型变化：名词复数形式 : blastulas
blastula的用法和样例：
例句
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。
词汇搭配
- roof of blastula囊胚盖
- bottom of blastula胆囊底, 囊胚底...
- blastula stage囊胚期,中胚期...
【近义词】