blastopore


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Related to blastopore: archenteron

blastopore

 [blas´to-por]
the opening of the archenteron to the exterior of the embryo at the gastrula stage.

blas·to·pore

(blas'tō-pōr),
The opening into the archenteron formed by invagination of the blastula to form a gastrula.
Synonym(s): protostoma, protostome
[blasto- + G. poros, opening]

blastopore

/blas·to·pore/ (blas´to-por) the opening of the archenteron to the exterior of the embryo at the gastrula stage.

blastopore

(blăs′tə-pôr′)
n. Embryology
The opening of the archenteron.

blas′to·por′al, blas′to·por′ic adj.

blastopore

[blas′təpôr]
Etymology: Gk, blastos + poros, opening
(in embryology) the opening into the archenteron made by invagination of the blastula.

blastopore

The opening of the archenteron, the primitive gut, to the outside, formed by invagination of cells on the embryo’s surface which form the mesoderm and endoderm during during gastrulation.

In some animals, the blastopore becomes the anus; in others, it closes and the anus opens at or near the same site; in some animals (e.g., chickens), invagination gives rise to a virtual blastopore at the primitive streak.

blas·to·pore

(blas'tō-pōr)
The opening into the archenteron formed by invagination of the blastula (e.g., amphibians) to form a gastrula.
[blasto- + G. poros, opening]

blastopore

the opening of the GASTRULA.

blastopore

the opening of the archenteron to the exterior of the embryo at the gastrula stage. Called also archistome, anus of Rusconi.
References in periodicals archive ?
The stomodeum does not appear to be derived from either the blastopore or the area in which the blastopore forms.
The evolution of the eumetazoan gut and blastopore made the swallowing and digestion of larger eukaryotes possible (Peterson et al.
A deep and narrow blastopore opening was observed in round non-ciliated 22-h-old embryos at 10 [degrees]C (Fig.
1L, 2F), with the development of nematocysts, and a ciliated actinopharynx, which replaced the blastopore.
Cells between the blastopore and presumptive prototrochal cells thickened to form a broad lip around the vegetal side of the gastrula (Fig.
mirabilis embryos were examined to learn how vegetal cells move toward the blastopore during gastrulation (Fig.
The larval gut is a transiently complete system, but an esophageal plug and rapid closure of the blastopore renders it nonfunctional.
The consistent and su stained downward swimming by gastrulae of cohort B, with the blastopore leading, indicates that the coordination of their cilia was different from that of negatively buoyant gastrulae that swim up, anterior end first, by moving water from anterior to posterior.
Prior to the opening of the mouth, early bipinnariae had a distinct stomodaeal invagination while the blastopore was still located at the vegetal pole [ILLUSTRATION FOR FIGURE 2A OMITTED].
A KOH (potassium hydroxide) preparation will demonstrate hyphae or blastopores in CCV.