archenteron


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Words related to archenteron

central cavity of the gastrula

References in periodicals archive ?
The blastopore and archenteron were visible in the diminished vegetal half of chlorpyrifos-treated larvae.
The archenteron formed as an invaginated tube of cells, presumably at the vegetal end of the blastula [ILLUSTRATION FOR FIGURE 1F OMITTED].
Embryos from which micromeres have been removed have delayed initiation of gastrulation and a slower rate of archenteron elongation compared to embryos with micromeres (Ishizuka et al.
It is possible that these extensions are retraction filaments or the trailing edges of cells retreating into the archenteron, though similar observations have not been noted in other studies, to our knowledge.
Once the archenteron reaches the animal end of the blastocoel, it folds over to one side (Fig.
Ciliated epithelia of cnidarians are known to be able to reverse the direction of the effective stroke (Holley and Shelton, 1984), so the ciliated gastraea could well have transported particles in and out of the archenteron.
Fully grown bipinnariae had ciliary bands divided into two loops; five conspicuous pairs of bipinnarian arms, which are hollow extensions of the body wall with ciliary bands arranged along the edge; and a complete gut formed by the fusion of the stomodeum to the anterior tip of the archenteron.
One side of the embryo appeared to contribute more dark cells to the developing archenteron than the other.
In this early 4-armed ophiopluteus, the archenteron has differentiated into a functional digestive tract: esophagus and stomach (Fig.
Gastrulation led to the formation of an embryo with two cell layers encompassing a central cavity--the archenteron (Figs.
Reconstruction of starfish eff by electric cell fusion: A new method of detecting the cytoplasmic determinant of archenteron formation.
In these embryos, unlike the embryos of regular echinoids, secondary mesenchyme cells did not seem to exert the force to pull up the archenteron toward the inner surface of the apical plate.
The sea urchin Brachyury gene (HpTa) is transiently expressed in the lineage of secondary mesenchyme cells: first in the vegetal plate of the mesenchyme blastula, extending to the tip of the invaginating archenteron, and finally in the secondary mesenchyme cells at the late-gastrula stage (16).
This results in the production of an archenteron that continues to develop, forming a new larval gut [ILLUSTRATION FOR FIGURES 1C, D and 2A OMITTED].