Blastocoel


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Related to Blastocoel: blastopore, Blastomeres

Blastocoel

 

segmentation cavity, cleavage cavity, primary body cavity, a cavity formed between the blastomeres in the embryo of an animal and filled with a liquid different in chemical composition from the surrounding medium. A blastocoel attains its greatest size towards the end of cleavage in the blastula stage. In the process of gastrulation it is gradually displaced by migrating cellular material.

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The blastocoels were observed and developed quickly to the gastrula stage within 2 days.
Observations on embryonic development of black-spot Jorunna, Jorunna funebris (Kelaart, 1859) (Gastropoda: Nudibranchia)
However, there was no sign of a blastocoel, a fluid-filled hole in the centre which is a common feature of modern animal embryos.
Letter: Surprising discovery by American scientists; Voice of the North
Although cleavage divisions were affected only at very high DMAE concentrations, embryos treated with lower concentrations at the two-cell stage subsequently developed malformations (Figure 3): overabundance of mesenchyme-like cells that accumulated first in the vegetal half of the blastocoel, and later occupied all of the blastocoel, blocking or inhibiting gastrulation; absence of a second pair of arms in mid-pluteus, or sometimes shortening or absence of one arm of the first pair (Figure 3H).
The sea urchin embryo as a model for mammalian developmental neurotoxicity: ontogenesis of the high-affinity choline transporter and its role in cholinergic trophic activity

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