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| | Lab Practical Study Guide |
 | | The neurula stage begins organogenesis in a frog embryo. | | | You should also be able to identify the archenteron of a frog embryo in the neurula stage. | | | You should be able to distinguish the difference between the archenteron and the blastoceol of a frog embryo in the early gastrula stage. |
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http://pages.cabrini.edu/ddunbar/Bio430/lab_practical_study_guide.htm
(460 words)
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| | Ur_lithium |
| | Extensive cellular movement and shpae change is responsible for the archenteron elongation (Ettensohn, 1985). | | | Abnormalities in archenteron development were observed in embryos that developed in LiCl solutions. | | | Disrupted archenteron development during treatment with LiCL clearly link these factors. |
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http://www.swarthmore.edu/NatSci/sgilber1/DB_lab/Urchin/Ur_lithium05.html
(493 words)
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| | Body cavities and the digestive system |
| | The tongue contributes to feeding behavior by either conducting water through the mouth (as is the case in fishes) or by actively manipulating the prey within the mouth | | | The formation of the digestive system begins early in development with the formation of the archenteron, from which most of the digestive system is derived (Fig. | | | the archenteron is continuous with the yolk sac, which will feed many vertebrates during development, or will become a more minor part of the body and instead the developing embryo will receive nutrients through the umbilical cord |
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http://www.shsu.edu/~bio_mlt/Chapter13.html
(2681 words)
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| | Discussion |
| | The various concentrations of alpha-D-mannose have no conclusive effects on the development of the archenteron of Lytechinus pictus embryos. | | | The results of this experiment show that our hypothesis is incorrect. | | | The experiments that were conducted this summer were performed to see if the sugar that the Lens Culinaris lectin specifically binds to,would affect the embryos in the same way. |
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http://hyper.vcsun.org/HyperNews/nherr/get/NSF3/23/9.html
(244 words)
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| | [No title] |
| | The liver develops as a ventral evagination of the archenteron just caudal to the stomach and heart, and the pancreas develops from one or more outgrowths with or near the liver evagination. | | | REFERENCES References for this chapter are combined with others on more caudal parts of the digestive system at the end of Chapter 17.The Development of the Digestive Tract #Figure 16-1 Lateral views of the development of the digestive tract of a terrestrial vertebrate. | | | The lining and glandular derivatives of the digestive tract develop from the endodermal archenteron; the rest of the wall develops from mesenchyme, most of which comes from splanchnic mesoderm. |
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http://www.bio.umass.edu/biology/bemis/FAOV4/Ch16.doc
(10449 words)
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| | Interactive Fly, Drosophila |
| | Hphnf3 may contribute to specification of embryonic cells as archenteron, and the role of HpTa may be directed towards specification of mesodermal founder cells. | | | However, after the onset of gastrulation Hphnf3 is expressed in the posterior part of the archenteron, whereas HpTa is expressed in the secondary mesenchyme founder cells, which occupy the tip of the archenteron. | | | Amphioxus HNF3beta expression is not detected in the anterior region of the archenteron, although the stage at which Xenopus HNF3beta expression begins is later than that of amphioxus. |
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http://www.sdbonline.org/fly/gene/forkhd2b.htm
(4319 words)
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| | Sea Urchin Gastrulation |
| | This is accomplished by the polymerization of microtubules in the apical to basal surface axis and the constriction of microfilaments at the apical surface. | | | The archenteron will continue to elongate up to the roof of the blastocoel cavity, bend to the left, fuse and eventually form the future oral opening. | | | The endoderm cells invaginate and start forming the archenteron. |
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http://www.luc.edu/depts/biology/dev/seaurgas.htm
(118 words)
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| | Hphnf3 |
| | Hphnf3 may contribute to specification of archenteron cells. | | | At the early gastrula stage when the archenteron begins to invaginate the cells surrounding the blastopore stain intensely, while there is less hybridization in the invaginating archenteron per se. | | | At the prism stage, the difference in expression level between the non-invaginating vegetal region and the invaginating archenteron becomes less evident. |
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http://occawlonline.pearsoned.com/bookbind/pubbooks/bc_mcampbell_genomics_1/medialib/method/mirror/urchin/u1hfhd.htm
(412 words)
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| | Developmental Biology Cinema, Miller |
| | While archenteron elongation is still under way, another group of mesenchyme cells at the tip of the archenteron becomes motile and extends filopodia. | | | These are the secondary mesenchyme cells; their filopodia contact and pull the archenteron to the ectoderm of the future mouth. | | | After a period of migration, they organize into a ring in the vegetal half of the blastocoel; they fuse to form a syncytium that secretes the skeleton of spicules. |
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http://www.sdbonline.org/archive/dbcinema/miller/miller.html
(776 words)
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| | upd10abd.html |
| | This was indeed observed, especially in one species, Lytechinus pictus. | | | 10.8a, the convergent extension of the archenteron by means of coordinated cell shape changes is drawn in a way that involves a decrease in the archenteron's diameter. | | | Convergent extension, whether it is driven by coordinated cell shape change or by cell intercalation, is thought to be an active movement, that is, driven by forces acting within the archenteron itself. |
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http://www.zo.utexas.edu/courses/kalthoff/bio349/upd10abd.html
(965 words)
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| | HpTa |
| | At the late gastrula stage, the archenteron has almost reached the wall of the most anterior part of the oral ectoderm and some secondary mesenchyme cells have separated from the archenteron wall into blastocoel. | | | Hybridization signals were found in cells of extending tip of the archenteron and secondary mesenchyme cells migrating from there. | | | In contrast, signals were not so evident in cells of the middle and posterior parts of the archenteron. |
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http://www.bio.davidson.edu/courses/genomics/mirror/urchin/u1hpta.htm
(510 words)
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| | Gastrulation |
| | Mesoderm breaks up into mesodermal segments; cavities form within segments and eventually fuse to give rise to coelom. | | | Notochord - forms from mesoderm along dorsal surface of archenteron. | | | Mesodermal crescents - initially along dorsal and ventral rims of "cup". |
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http://biology.semo.edu/courses/zo314/gastrul.html
(660 words)
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| | archenteron - definition of archenteron by the Free Online Dictionary, Thesaurus and Encyclopedia. |
| | This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. | | | archenteron - central cavity of the gastrula; becomes the intestinal or digestive cavity | | | archenteron - definition of archenteron by the Free Online Dictionary, Thesaurus and Encyclopedia. |
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http://www.thefreedictionary.com/archenteron
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| | OEDILF - Word Search |
| | The following limerick is in a "Tentative" state, which means the information contained within has not yet been verified. | | | The information on this page may not be reproduced in any form without written permission by the. | | | (BLAS-tuh-por): small opening to the archenteron, or first gut pouch of the embryo, formed in the gastrula stage. |
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http://www.oedilf.com/db/Lim.php?Word=archenteron
(219 words)
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| | SpMsx |
| | Whole mount in situ hybridization showed that in blastula stage embryos, SpMsx transcripts are distributed througout the embryo, with the most intense signal at the vegetal plate. | | | By the early gastrula stage, SpMsx transctipts are localized in the invaginating archenteron, but are not detectable in primary mesenchyme cells. | | | Archenteron, secondary mesenchyme cells at the tip of archenteron, OE overlying archenteron |
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http://www.bio.davidson.edu/Courses/genomics/mirror/Urchin/u1msxu.htm
(296 words)
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| | Convergent Extension in the Archenteron |
| | How does the archenteron elongate, given that both autonomous extension and secondary mesenchyme cell dependent extension occur? | | | A more direct demonstration of this was provided by Hardin (1989), who used fluorescent clones of cells in chimeric embryos to show that the | | | By sectioning through the archenteron, Ettensohn (1985) and Hardin and Cheng (1986) showed that sea urchin gastrulae elongate their archenterons via convergent extension. |
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http://worms.zoology.wisc.edu/urchins/SUgast_secondary5.html
(101 words)
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| | archenteron : Definition |
| | Search for archenteron in these other databases too |
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http://www.everythingbio.com/glos/definition.php?ID=2890
(132 words)
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