archenteron

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ar·chen·ter·on

(är-kĕn′tə-rŏn′, -tər-ən)

The central cavity of the gastrula, which ultimately becomes the intestinal or digestive cavity.

ar′chen·ter′ic (är′kĕn-tĕr′ĭk) adj.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

archenteron

(ɑːˈkɛntəˌrɒn)

(Anatomy) the cavity within an embryo at the gastrula stage of development that eventually becomes the digestive cavity

[C19: from Greek arkhē beginning + enteron intestine]

archenteric adj

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

arch•en•ter•on

(ɑrˈkɛn təˌrɒn)

n.
pl. -ter•a (-tər ə)

the primitive enteron or digestive cavity of a gastrula.

[1875–80]

arch`en•ter′ic (-ˈtɛr ɪk) adj.

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Noun

archenteron - central cavity of the gastrula; becomes the intestinal or digestive cavity

gastrula - double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm

blastopore - the opening into the archenteron

bodily cavity, cavum, cavity - (anatomy) a natural hollow or sinus within the body

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Among them, epidural lipomatosis usually occurs in obese people, patients with a history of corticosteroid use, and those with an endocrinopathy.[2] The Kovalevsky or neurenteric canal is defined as a canal connecting the neural tube and archenteron in the embryo, resulting from a persisting abnormal communication between the notochord and yolk sac and the amnion during an early stage of embryonic development.

Posterior Mediastinal, Intraspinal, Intradural, Intramedullary Lipoma through a Kovalevsky Canal in the Thoracic Spine

Invagination of the archenteron is apparent by 46 h PF (Fig.

Larval development of two N. E. Pacific Pilidiophoran Nemerteans (Heteronemertea; Lineidae)

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ENTEROCOELE the body cavity formed from an outpocketing of the archenteron (a primitive digestive cavity), especially typical of echinoderms and chordates [RHD].

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These cells then started to darken, losing their transparency (Figure 4A, B), and became located along the inner surface of the body wall; in contrast, cells in normal larvae retained their transparency and were located near the primary gut (archenteron), moving later through the blastocele to the animal pole (Figure 4C, F).

An Invertebrate Model of the Developmental Neurotoxicity of Insecticides: Effects of Chlorpyrifos and Dieldrin in Sea Urchin Embryos and Larvae

Some features of early embryos (the blastocoel, the archenteron of the gastrula) could be seen in specimens pressed gently between a glass slide and coverslip.

Evolutionary loss of larval feeding: development, form and function in a facultatively feeding larva, Brisaster latifrons

Three of the sampled embryos were late gastrulae, with an archenteron filled with granular material, but not forming coeloms (data not shown).

An externally brooding acorn worm hemichordata, enteropneusta, torquaratoridae from the Russian Arctic

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., 2001).

Larval development and metamorphosis of the deep-sea Cidaroid urchin Cidaris blakei

The resulting blastopore started as a wide pit, subsequently deepening into the archenteron (Fig.

Complete development of the northeast Pacific arminacean nudibranch Janolus fuscus

During the initial stages of digestive organ development, the archenteron of mouth-forming larvae (36 h) had no TRITC-phalloidin-positive fibrous structures (Fig.

Morphological maturation level of the esophagus is associated with the number of circumesophageal muscle fibers during archenteron formation in the starfish Patiria (Asterina) pectinifera

The invaginated archenteron retains a narrow but definite lumen.

Unusual development of the mitraria larva in the polychaete Owenia collaris

Haeckel (1874) suggested that the eumetazoan ancestor was a gastraea with ectoderm, endoderm, and archenteron with blastopore, essentially having the same structure as that of larval and adult cnidarians and of ontogenetic stages of many bilaterians.