| 单词 | blastosphere |
| 释义 | blastosphere (once / 381269 pages) n WORD FAMILY blastosphere USAGE EXAMPLESThe cavity of the blastosphere, or segmentation cavity. Webster, Noah, Webster's Unabridged Dictionary—(2n...(2012) Thus, an oval and an elongate egg produce respectively an oval and an elongate blastosphere. Hertwig, Oscar, The Biological Problem of To-day—Pr...(2011) The central part of the blastosphere is called the segmentation cavity or blastocoel. Various, Encyclopaedia Britannica, 11th Edit...(2011) 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 Syn|Hypo|Hyper blastula blastocyst, blastodermic vessicle the blastula of a placental mammal in which some differentiation of cells has occurred conceptus, embryo, fertilized egg an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life |
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