Britannica online encyclopedia article on blastula (biology), hollow sphere of cells, or blastomeres, produced during the development of an embryo by repeated cleavage of a fertilized egg. The cells of the blastula form an epithelial (covering) layer, called the blastoderm, enclosing a fluid-filled cavity, the blastocoel.
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www.britannica.com/EBchecked/topic/69108/blastula
www.britannica.com/EBchecked/topic/69108/blastula
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Cleavage - Blastula Structure ... The blastula is a hollow ball of cells organized into an epithelial monolayer. Midway through the blastula stage, the embryo secretes hatching enzyme, which results in proteolytic degradation of the fertilization envelope.
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worms.zoology.wisc.edu/urchins/SUcleavage_blastula.html
worms.zoology.wisc.edu/urchins/SUcleavage_blastula.html
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A L. variegatus hatched blastula, showing the thickened vegetal plate and obvious blastocoel (micrograph courtesy of Dr. Chuck Ettensohn, Carnegie-Mellon Univ). ... The blastula is a hollow ball of cells organized into an epithelial monolayer (i.e., it is a single cell layer thick). Midway through the blastula stage,
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worms.zoology.wisc.edu/dd2/echino/cleavage/blastula/bla...
worms.zoology.wisc.edu/dd2/echino/cleavage/blastula/blastula.html
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Definition of blastula in the Online Dictionary. Meaning of blastula. Pronunciation of blastula. Translations of blastula. blastula synonyms, blastula antonyms. Information about blastula in the free online English dictionary and encyclopedia. ... blastula - early stage of an embryo produced by cleavage of an ovum;
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www.thefreedictionary.com/blastula
www.thefreedictionary.com/blastula
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blastula n. , pl. , -las , or -lae ( ). An early embryonic form produced by cleavage of a fertilized ovum and consisting of a spherical layer of ... The blastula is usually a hollow sphere. Its wall may vary from one to several cells in thickness. In eggs which contain considerable amounts of yolk the blastocoele may...
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www.answers.com/topic/blastula
www.answers.com/topic/blastula
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Early stage in the development of a fertilized egg, when the egg changes from a solid mass of cells (the morula) to a hollow ball of cells (the blastula), containing a fluid-filled cavity (the blastocoel) ... More Links Within This Section ... Skip to page content | Text only Graphical version of this page;
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www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0...
www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0007957.html
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An early developmental stage of vertebrate embryos formed by cleavage of the fertilized egg, in which the embryo consists of a single layer of cells surrounding a cavity (the blastocoel) ... Biology Glossary search by EverythingBio.com ... Website created and maintained by: Mark Lefers and the Holmgren Lab last updated:
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www.biochem.northwestern.edu/holmgren/Glossary/Definiti...
www.biochem.northwestern.edu/holmgren/Glossary/Definitions/Def-B/blastula.html
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blastula: Definition and Pronunciation ... World & News ... blastula (Thesaurus)
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www.factmonster.com/ipd/A0344354.html
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Xenopus anatomical entity ... Xenopus developmental stage ... blastula | Link Here | Subscribe...
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bioportal.bioontology.org/virtual/1095/XAO:1000003
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