Schizocoely

Last updated

Schizocoely (adjective forms: schizocoelous or schizocoelic) is a process by which some animal embryos develop. The schizocoely mechanism occurs when secondary body cavities (coeloms) are formed by splitting a solid mass of mesodermal embryonic tissue. [1] [2] All schizocoelomates are protostomians[ contradictory ] and they show holoblastic, spiral, determinate cleavage.

Contents

Etymology

The term schizocoely derives from the Ancient Greek words σχίζω (skhízō), meaning 'to split', and κοιλία (koilía), meaning 'cavity'. [3] [4] This refers to the fact that fluid-filled body cavities are formed by splitting of mesodermal cells.

Taxonomic distribution

Animals called protostomes develop through schizocoely for which they are also known as schizocoelomates.

Schizocoelous development often occurs in protostomes, [1] [5] [6] as in phyla Mollusca, Annelida, and Arthropoda. Deuterostomes usually exhibit enterocoely; [7] however, some deuterostomes like enteropneusts can exhibit schizocoely as well. [8]

Embryonic development

The term refers to the order of organization of cells in the gastrula leading to development of the coelom. In mollusks, annelids, and arthropods, the mesoderm (the middle germ layer) forms as a solid mass of migrated cells from the single layer of the gastrula. The new mesoderm then splits, creating the pocket-like cavity of the coelom.

See also

References

  1. 1 2 Moore, Janet; Overhill, Raith (2006). An introduction to the invertebrates. Cambridge University Press. ISBN   9780521857369.
  2. ↑ Lüter, Carsten (2000-06-01). "The origin of the coelom in Brachiopoda and its phylogenetic significance". Zoomorphology. 120 (1): 15–28. doi:10.1007/s004359900019. ISSN   1432-234X. S2CID   24929317.
  3. ↑ Bailly, Anatole (1981-01-01). Abrégé du dictionnaire grec français. Paris: Hachette. ISBN   2010035283. OCLC   461974285.
  4. ↑ Bailly, Anatole. "Greek-french dictionary online". www.tabularium.be. Retrieved 2020-03-05.
  5. ↑ Adoutte, André; Balavoine, Guillaume; Lartillot, Nicolas; Rosa, Renaud de; Adoutte, André; Balavoine, Guillaume; Lartillot, Nicolas; Rosa, Renaud de (1999-03-01). "Animal evolution: the end of the intermediate taxa?" . Trends in Genetics. 15 (3): 104–108. doi:10.1016/S0168-9525(98)01671-0. ISSN   0168-9525. PMID   10203807.
  6. ↑ Technau, Ulrich; Scholz, Corinna B. (2003). "Origin and evolution of endoderm and mesoderm". The International Journal of Developmental Biology. 47 (7–8): 531–539. ISSN   0214-6282. PMID   14756329.
  7. ↑ Satoh, Gouki; Harada, Yoshito; Satoh, Nori (September 2000). "The expression of nonchordate deuterostome Brachyury genes in the ascidian Ciona embryo can promote the differentiation of extra notochord cells". Mechanisms of Development. 96 (2): 155–163. doi:10.1016/S0925-4773(00)00395-6. PMID   10960780. S2CID   6732563.
  8. ↑ Kaul-Strehlow, Sabrina; Stach, Thomas (2011-05-11). "The pericardium in the deuterostome Saccoglossus kowalevskii (Enteropneusta) develops from the ectoderm via schizocoely". Zoomorphology. 130 (2): 107. doi:10.1007/s00435-011-0125-0. ISSN   1432-234X. S2CID   22199440.


This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.