from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The fluid-filled, central cavity of a blastula. Also called segmentation cavity.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative spelling of blastocoele.
from the GNU version of the Collaborative International Dictionary of English
- n. The cavity inside a blastula; -- also called segmentation cavity.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the fluid-filled cavity inside a blastula
Sorry, no etymologies found.
I wonder if Fred Thompson knows how to spell "zygote" or "blastocoel"?
The blastocyst is a sphere made up of an outer layer of cells (the trophoblast), a fluid-filled cavity (the blastocoel), and a cluster of cells on the interior (the inner cell mass).
Perhaps they're hoping the the terms "trophoblast", "blastocoel", and "blastocyst" will disguise the fact that we're talking about a human being?
In this intermediate stage there are two cavities in the embryo -- the original cavity (blastocoel) which is disappearing, and the primitive gut-cavity (progaster) which is forming.
A blastula, with wide embryonic cavity (blastocoel, bl), g incipient invagination.
Cell migration is visible through the transparent blastocoel roof of the gastrula.
At the beginning of gastrulation, the blastocoel roof is one cell thick, and the dorsal lip of the blastopore forms below the equator of the embryo.
Peirce SM, Skalak TC, Davidson L, Marsden M, et al. (2004) Multicellular computer simulation of morphogenesis: blastocoel roof thinning and matrix assembly in Xenopus laevis.
Consistent with previous studies , ectopic Pmar1-misexpressing cells ingressed into the blastocoel at the same time as endogenous primary mesenchyme cells.
DIC images in (B) d and h, (C) d and h, and (D) d illustrate the absence of detectable developmental defects in injected embryos. gfp-expressing cells containing Pmar1 in (D) panels g and h have adopted a mesenchyme phenotype and ingressed into the blastocoel at 20 h p.f. ActivinB Is a Critical Component of Both PMC and EM-GRNs Underlying Pmar1 - Dependent Induction