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  • myotome
  • Amphioxus somites have myotome and non-myotome compartments, but development and fates of the latter are incompletely described. (biomedcentral.com)
  • The amphioxus somite differentiates medially into myotome, laterally into the external cell layer (a sub-dermal mesothelium), ventrally into a bud that forms mesothelia of the perivisceral coelom, and ventro-medially into the sclerotome. (biomedcentral.com)
  • Throughout development, all cells originating from the non-myotome regions of somites strongly express a fibrillar collagen gene, ColA, and thus likely contribute to extracellular matrix of the dermal and axial connective tissue system. (biomedcentral.com)
  • We provide a revised model for the development of amphioxus sclerotome and fin boxes and confirm previous reports of development of the myotome and lateral somite. (biomedcentral.com)
  • Ultrastructure and collagen expression suggest that all non-myotome somite derivatives contribute to extracellular matrix of the dermal and axial support systems. (biomedcentral.com)
  • zebrafish
  • Intrinsic expression of "clock genes" must oscillate with a periodicity equal to the time necessary for one somite to form, for example 30 minutes in zebrafish, 90 minutes in chicks, and 100 minutes in snakes. (wikipedia.org)
  • tissues
  • The Dmrt2 gene is expressed in gonadal tissues with species difference, as well as in some nongonadal tissues such as somites (Meng et al. (thefreedictionary.com)
  • The neural crest and somites, progenitors of the peripheral nervous system and of skeletal tissues, respectively, beautifully illustrate the significance of EMT to the above processes. (mdpi.com)
  • Mutations that disrupt the patterning of individual somites have dramatic effects on these tissues, including fusions of the ribs and vertebrae. (biologists.org)
  • halves
  • Improper subdivision of the somites into R-C halves results most noticeably in the formation of fused ribs and vertebrae. (biologists.org)
  • phenotype
  • In one study, this phenotype was mimicked by Shh inhibitors, and timely somite formation was rescued by exogenous Shh protein, showing that the missing signal produced by the notochord is mediated by Shh. (wikipedia.org)
  • pairs
  • 5A): Separated from the 6th abdominal somite with seven pairs of setae. (thefreedictionary.com)
  • Two well developed pairs of somites appear with the beginning of a third. (edu.au)
  • A short description of one embryo with two to three pairs of somites and a comparison of it with others of the same age may still be of value. (edu.au)
  • The somitomeres organize into somites which grow in pairs. (wikipedia.org)
  • genes
  • Hence, no significant effect of temperature on the spatial and temporal expression of the genes studied was found in relation to somite stage. (biologists.org)
  • formation
  • Somite formation can be induced by Noggin-secreting cells. (wikipedia.org)
  • After somites are made, their identity as a whole has already been determined, as is shown by the fact that transplantation of somites from one region to a completely different region results in the formation of structures usually observed in the original region. (wikipedia.org)