Blastula. A hollow sphere of cells surrounding a fluid-filled cavity. Many animals produce a blastula stage embryo early in development, prior to gastrulation. |
23 нояб. 2024 г. · After the cleavage has produced over 100 cells, the embryo is called a blastula. The blastula is usually a spherical layer of cells (the ... |
BLASTULA PERIOD (2 1/4 - 5 1/4 h) We use the term blastula to refer to the period when the blastodisc begins to look ball-like, at the 128-cell stage, or 8th ... |
23 окт. 2024 г. · the early stage of development of an animal, consisting of a layer of cells around a hollow space: In animals, cleavage results in the ... |
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