• or blastula) A hollow ball of cells formed from a morula about five days after fertilization. (thefreedictionary.com)
  • De forskjellige typene deling ender alle i en ball av celler, kalt en morula . (wikipedia.org)
  • Hos glassvamper skjer dette allerede på 32-cellers stadiet Nesledyr og ribbemaneter klekker også på morula-stadiet, og gir opphav til en avflaten larve som likner svampenes, og kalles en planula . (wikipedia.org)
  • Blastula is a stage of early embryonic development of animals. (pediaa.com)
  • With few exceptions, animals are motile (able to move), heterotrophic (consume organic material), reproduce sexually , and their embryonic development includes a blastula stage. (wikipedia.org)
  • now show that neural crest cells have components of the molecular programs characteristic of blastula cells from earlier in development (see the Perspective by Hoppler and Wheeler). (sciencemag.org)
  • We suggest that neural crest cells may have evolved as a consequence of a subset of blastula cells retaining activity of the regulatory network underlying pluripotency. (sciencemag.org)
  • Though neural crest cells and blastula cells have many similarities, they express different Sox transcription factors, with the neural crest transitioning to expressing SoxE factors (Sox8-10). (biologists.com)
  • During the blastula stage of development, a significant amount of activity occurs within the early embryo to establish cell polarity, cell specification, axis formation, and regulate gene expression. (wikipedia.org)
  • Cellularisation, a key feature of the mid‐blastula transition, marks the time at which zygotic transcription occurs and maternal products are degraded. (els.net)
  • any cell that occurs in the BLASTULA . (thefreedictionary.com)
  • Then along the line of invagination, i.e. the primitive orifice or blastopore, runs the outer layer of cells or ectoderm into the two invaginated layers, the mesoderm (originating from the marginal zone), and entoderm (corresponding to the vegetative half of the blastula, rich in yolk). (nobelprize.org)
  • In 1952 Robert Briggs and Thomas J. King published their article, "Transplantation of Living Nuclei from Blastula Cells into Enucleated Frogs' Eggs," in the Proceedings of the National Academy of Sciences , the culmination of a series of experiments conducted at the Institute for Cancer Research and Lankenau Hospital Research Institute in Philadelphia, Pennsylvania. (asu.edu)
  • The blastula stage of early embryo development begins with the appearance of the blastocoele. (wikipedia.org)
  • In many organisms the development of the embryo up to this point and for the early part of the blastula stage is controlled by maternal mRNA, so called because it was produced in the egg prior to fertilization and is therefore exclusively from the mother. (wikipedia.org)
  • Moreover, several activities occur in the blastula stage of the embryo including the establishment of cell polarity, regulation of gene expression , cell specification, axis formation, etc. (pediaa.com)
  • Agrican clawed frog embryo was cut in halves at blastula stage. (flashcardmachine.com)
  • Animals are generally considered to be multicellular organisms that are capable of locomotion in response to their environment (motile), are required to ingest or eat and swallow other organisms to gain proper nutrition (heterotropic), contain within each cell genetic material organized as two sets of chromosomes within a membrane-bound nucleus ( eukaryotic ), develop through a blastula (hollow ball) stage, and integrate muscle tissue, nervous tissue, and collagen into their body. (newworldencyclopedia.org)
  • Disclaimer: Blastula definition / meaning 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. (definithing.com)
  • This ball grows into a blastula which later develops into a baby. (wikibooks.org)
  • In cnidarians, the blastula assumes the form of the planktonic planula larva which then directly develops features of an adult with no front, back, left, or right. (umd.edu)
  • The cortical nuclear divisions continue until the mid‐blastula transition (MBT), at which time cellularisation results in the formation of a multicellular embryo. (els.net)
  • The blastula implants on what day after fertilization? (studystack.com)
  • The end result of it is that all the material of the marginal zone and of the vegetative half of the blastula becomes invaginated and is thus covered over by animal material. (nobelprize.org)