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Topic: Archenteron

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	Suflate
		Karp and Solursh have hypothesized that secondary mesenchyme cells, which form the filopodia of the developing archenteron (primary gut) require sulfate (to form sulfated proteoglycans which act as something like an adhesive) in order to migrate along the acid mucopolysaccharide of the extracellular matrix within the blastocoel of a developing sea urchin (1974).
		Developing sea urchin embryos were raised in either artificial sea water or sulfate-free sea water, fixed, and stained for alkaline phosphotase enzyme activity and with immunofluorescent antibodies to vegetal archenteron cells.
		The migration of the archenteron depends not only on signals and proteins already present in the egg, but also on extracellular materials that have been incorporated into the organism.
	www.swarthmore.edu /NatSci/sgilber1/DB_lab/Urchin/Matthews/sulfate.html (463 words)

	Archenteron - Wikipedia, the free encyclopedia
		The archenteron is an indentation that forms early on in a developing blastula.
		In deuterostomes, the archenteron's beginning (where it invaginates) becomes its anus, and where it eventually connects with the other end of the gastrula becomes the animal's mouth.
		The archenteron is known as the primitive gut that forms during gastrulation in the developing embryo.
	en.wikipedia.org /wiki/Archenteron (175 words)

	Lab Practical Study Guide
		Early gastrula – The early gastrula is beginning to form the archenteron at the marginal zone of the embryo.
		You should be able to distinguish the difference between the archenteron and the blastoceol of a frog embryo in the early gastrula stage.
		The archenteron will be nearer the yolk plug and much bigger then the blastocoel at this stage of frog embryogenesis.
	pages.cabrini.edu /ddunbar/Bio430/lab_practical_study_guide.htm (460 words)

	Gastrulation - Wikipedia, the free encyclopedia
		At the beginning of vertebrate gastrulation, the embryo is a hollow ball of cells known as the blastula, with an animal pole and a vegetal pole.
		The vegetal pole begins to flatten and then invaginates into the interior, replacing the blastocoelic cavity and thereby forming a new cavity, the archenteron (literally: primitive gut), the opening into which is the blastopore.
		Once the archenteron reaches the animal pole, a perforation forms, and the archenteron becomes a digestive tract passing all the way through the embryo.
	en.wikipedia.org /wiki/Gastrulation (354 words)

	Reference.com/Encyclopedia/Archenteron
		The archenteron is known as the primitive gut that forms during gastrulation in the developing blastula.
		The cells continue to be rearranged until the shallow dip formed by invagination transforms into a deeper, narrower pouch formed by the gastrula's endoderm.
		The filopodia--thin fibers formed by the mesenchyme cells--found in a late gastrula contract to drag the tip of the archeteron across the blastocoel.
	www.reference.com /browse/wiki/Archenteron (245 words)

	[No title]
		At first, the archenteron has a broad connection with the yolk sac, but the formation of head and tail folds and lateral body folds gradually separates the embryo from the yolk sac.
		The archenteron becomes differentiated into a foregut, extending toward the head; a hindgut, extending toward the tail; and a midgut, which remains connected to the yolk sac.
		It is separated from the archenteron for a short period by the cloacal membrane.
	www.bio.umass.edu /biology/bemis/FAOV4/Ch16.doc (10449 words)

	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.
		This elongates the archenteron tube upwards towards the roof of the blastocoel cavity.
		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.
	www.luc.edu /faculty/wwasser/dev/seaurgas.htm (118 words)

	Contribution of maternal factors and cellular interaction to determination of archenteron in the starfish embryo -- ...
		Contribution of maternal factors and cellular interaction to determination of archenteron in the starfish embryo -- Kuraishi and Osanai 120 (9): 2619 -- Development
		Contribution of maternal factors and cellular interaction to determination of archenteron in the starfish embryo
		determination of archenteron in a starfish embryo was analyzed by (1)
	dev.biologists.org /cgi/content/abstract/120/9/2619 (507 words)

	HpTa
		At the mid-gastrula stage, the archenteron has extended to nearly a half of the blastocoel and two islands of skeletogenic sites are formed by the primary mesenchyme cells.
		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.
		Intense hybridization signals were detected in the secondary mesenchyme cells and cells of the archenteron tip, whereas the other cells of the archenteron showed barely detectable signals.
	www.bio.davidson.edu /courses/genomics/mirror/urchin/u1hpta.htm (510 words)

	Convergent Extension in the Archenteron (Site not responding. Last check: 2007-11-03)
		By sectioning through the archenteron, Ettensohn (1985) and Hardin and Cheng (1986) showed that sea urchin gastrulae elongate their archenterons via convergent extension.
		epithelial cells of the archenteron rearrange as it elongates.
		Note that on the left, the clone has smooth boundaries; by the end of gastrulation, the clone has intercalated with neighboring unlabeled cells to generate a jagged boundary.
	worms.zoology.wisc.edu /urchins/SUgast_secondary5.html (101 words)

	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.
		In late gastrula, SpMsx transcripts are visible throughout archenteron and in secondary mesenchyme cells at the tip of archenteron.
	www.bio.davidson.edu /Courses/genomics/mirror/Urchin/u1msxu.htm (296 words)

	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.
		The dimensions of the filopodia of migrating primary mesenchyme cells and secondary mesenchyme cells pulling the tip of the archenteron are 1 µm, or more, in diameter.
	www.sdbonline.org /archive/dbcinema/miller/miller.html (776 words)

	Hphnf3 (Site not responding. Last check: 2007-11-03)
		At mesenchyme blastula intence staining is observed at the vegetal plate.
		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.
	occawlonline.pearsoned.com /bookbind/pubbooks/bc_mcampbell_genomics_1/medialib/method/mirror/urchin/u1hfhd.htm (412 words)

	Discussion
		Recently, however, a study was conducted showing that the Lens Culinaris lectin binds specifically to secondary mesenchyme cells, preventing the anchoring of the archenteron (latham, et al.
		This casued the archenteron of gastrula stage embryos to exogatrulate or fall entirely out of the embryo.
		These results also suggest that the mechanism by which the primary mesenchyme cells bind to the roof of the archenteron is more complex then prevoiusly thought, and warrants further investigation.
	hyper.vcsun.org /HyperNews/nherr/get/NSF3/23/9.html (244 words)

	Body cavities and the digestive system
		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
		The oral cavity is formed by an invagination at the anterior part of the embryo, called the stomodeum that differentiates and eventually becomes connected to the archenteron or gut tube
	www.shsu.edu /~bio_mlt/Chapter13.html (2681 words)

	Archenteron
		English words defined with "archenteron": Archenteric &diams; blastopore.
		The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications.
		Archenteron (coelenteron, gastrocoele), Urdarm (coelenteron, gastrocoele), Gastrozöl (coelenteron, gastrocoele), Canalis entodermalis (coelenteron, gastrocoele).
	www.websters-online-dictionary.org /definition/english/ar/archenteron.html (283 words)

	Gastrulation
		Notochord - forms from mesoderm along dorsal surface of archenteron.
		Epiboly = expansion of dorsal blastoderm due to thinning; as layer of cells expands, cells are pushed around the lips of the blastopore into the interior.
		Endoderm = cells of roof, floor, and walls of archenteron.
	biology.semo.edu /courses/zo314/gastrul.html (660 words)

	upd10abd.html
		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.
		Answer: Yes, the archenteron could grow in length while maintaining its diameter if the thickness of the archenteron wall decreased.
		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.
	www.zo.utexas.edu /courses/kalthoff/bio349/upd10abd.html (965 words)

	Regulative capacity of the archenteron during gastrulation in the sea urchin -- McClay and Logan 122 (2): 607 -- ...
		Regulative capacity of the archenteron during gastrulation in the sea urchin -- McClay and Logan 122 (2): 607 -- Development
		Regulative capacity of the archenteron during gastrulation in the sea urchin
		all parts of the archenteron, the remaining veg 1 and /or veg 2 tissue
	dev.biologists.org /cgi/content/abstract/122/2/607 (591 words)

	The Regional Properties of Amphibian Organizer Tissue After Disaggregation of its Cells in Alkali -- DEUCHAR 30 (1): 18 ...
		The archenteron roof from the late gastrula also showed no deterioration
		middle or three posterior thirds of the archenteron roof in
		somites was always associated with the presence of an archenteron
	jeb.biologists.org /cgi/content/abstract/30/1/18 (510 words)

	Transplantation of RNA-Labeled Micromeres into Animal Halves of Sea Urchin Embryos. A Contribution to the Problem of ...
		During contact with the wall, the implanted cells exert such an influence upon the cells in the neighborhood that these differentiate into endoderm, invaginate as archenteron, and eventually form a typical digestive tract.
		The formation of the archenteron, etc., is a striking case of induction (Horstadius, 1935), a process in which differentiation of a group of cells is initiated by other cells which themselves never perform this differentiation.
		At the end of the 16-cell stage, only the micromeres are synthesizing RNA, or they do so to a much greater extent than other blastomeres (Fig.1) (Czihak, 1965a, b).
	www.euchromatin.org /Czihak02.htm (1035 words)

	Archenteron
		The word "archenteron" uses 11 letters: A C E E H N N O R R T.
		Words within archenteron not shown as it has more than seven letters.
		List all words starting with archenteron, words containing archenteron or words ending with archenteron
	www.morewords.com /word/archenteron (155 words)

	Cellular basis of gastrulation in the sand dollar Scaphechinus mirabilis -- Kominami and Takata 199 (3): 287 -- The ...
		exert the force to pull up the archenteron toward the inner surface of the
		In fact, the archenteron cells were not stretched along the
		archenteron cells, may play a key role in the archenteron elongation in S. mirabilis embryos.
	www.biolbull.org /cgi/content/abstract/199/3/287 (325 words)

	archenteron - OneLook Dictionary Search
		Tip: Click on the first link on a line below to go directly to a page where "archenteron" is defined.
		archenteron : The American Heritage® Dictionary of the English Language [home, info]
		Archenteron : Online Plain Text English Dictionary [home, info]
	www.onelook.com /?w=archenteron (172 words)

	OEDILF - Word Search
		The following limerick is in a "Tentative" state, which means the information contained within has not yet been verified.
		(BLAS-tuh-por): small opening to the archenteron, or first gut pouch of the embryo, formed in the gastrula stage.
		The information on this page may not be reproduced in any form without written permission by the.
	www.oedilf.com /db/Lim.php?Word=archenteron (219 words)

	Definition of archenteron - Merriam-Webster Online Dictionary
		Learn more about "archenteron" and related topics at Britannica.com
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		See a map of "archenteron" in the Visual Thesaurus
	www.m-w.com /dictionary/archenteron (36 words)

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	www.stupid.ca /forums/member.php?u=1533 (25 words)

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