| 单词 | blastodermic vessicle |
| 释义 | blastodermic vessicle (extremely rare) n WORD FAMILY blastodermic vessicle n the blastula of a placental mammal in which some differentiation of cells has occurred Syn|Hyper blastocyst blastosphere, blastula 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 |
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