Mesoderm


Mesoderm
Mesoderm
Mesoderm.png
Tissues derived from mesoderm.
Gray21.png
Section through the embryo
Gray's subject #6 49
Days 16
MeSH Mesoderm

In all bilaterian animals, the mesoderm is one of the three primary germ cell layers in the very early embryo. The other two layers are the ectoderm (outside layer) and endoderm (inside layer), with the mesoderm as the middle layer between them.[1][2]

The mesoderm forms mesenchyme (connective tissue), mesothelium, non-epithelial blood corpuscles and coelomocytes. Mesothelium lines coeloms; forms the muscles, septa (cross-wise partitions) and mesenteries (length-wise partitions); and forms part of the gonads (the rest being the gametes).[1]

The mesoderm differentiates from the rest of the embryo through intercellular signaling, after which the mesoderm is polarized by an organizing center.[3]

Contents

See also

References

  1. ^ a b Ruppert, E.E., Fox, R.S., and Barnes, R.D. (2004). "Introduction to Bilateria". Invertebrate Zoology (7th ed.). Brooks/Cole. pp. 217–218. ISBN 0030259827. [unreliable source?]
  2. ^ Langman's Medical Embryology, 11th edition. 2010.
  3. ^ Kimelman, D. & Bjornson, C. (2004). "Vertebrate Mesoderm Induction: From Frogs to Mice". In Stern, Claudio D.. Gastrulation: from cells to embryo. CSHL Press. p. 363. ISBN 9780879697075. http://books.google.com/books?id=ljAKtC-iIrIC&pg=PA363. 

Further reading

External links


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Look at other dictionaries:

  • Mesoderm — Mesoderm, in der Embryonalentwicklung höherer Tiere (⇒ Bilateria) bei der ⇒ Keimblätterbildung entstehendes drittes Keimblatt, das sich zwischen Ektoderm und Entoderm schiebt. Man unterscheidet verschiedene Entstehungswege: a) Abfaltung… …   Deutsch wörterbuch der biologie

  • mesoderm — (n.) 1858, from Fr. mésoderme or Ger. Mesoderm, lit. middle skin, coined by German physician Robert Remak (1815 1865) from MESO (Cf. meso ) + Gk. derma (see DERM (Cf. derm)) …   Etymology dictionary

  • Mesoderm — Mes o*derm, n. [Meso + Gr. de rma skin.] (Biol.) (a) The layer of the blastoderm, between the ectoderm and endoderm; mesoblast. See Illust. of {Blastoderm} and {Ectoderm}. (b) The middle body layer in some invertebrates. (c) The middle layer of… …   The Collaborative International Dictionary of English

  • Mesodérm — Mesodérm, s. Keimblätter und Entwickelungsgeschichte, S. 845 …   Meyers Großes Konversations-Lexikon

  • Mesodérm — (grch.), s. Gastrula …   Kleines Konversations-Lexikon

  • mesoderm — [mes′ə dʉrm΄, mez′ə dʉrm΄] n. [ MESO + DERM] the middle layer of cells of an embryo, from which the skeletal, reproductive, muscular, vascular, connective, etc. tissues develop mesodermal adj. mesodermic …   English World dictionary

  • Mesoderm — Das Mesoderm ist das mittlere Keimblatt des Embryoblasten. Die Mesoderm Zellen entstehen beim Menschen in der dritten Entwicklungswoche durch Einwanderung zwischen Epiblast und Hypoblast (Schizocoelie). Der Begriff Mesoderm ist nicht… …   Deutsch Wikipedia

  • mesoderm — The middle of the three primary germ layers of the embryo (the others being ectoderm and endoderm); m. is the origin of connective tissues, myoblasts, blood, the cardiovascular and lymphatic systems, most of the urogenital system, and the …   Medical dictionary

  • Mesoderm — Me|so|dẹrm 〈n. 11; Biol.〉 das mittlere Keimblatt des sich entwickelnden Embryos [<grch. mesos „mittel “ + derma „Haut“] * * * Me|so|dẹrm, das; s, e [zu griech. dérma = Haut] (Biol., Med.): (während der Embryonalphase) bei vielzelligen Tieren …   Universal-Lexikon

  • mesoderm — n. the middle germ layer of the early embryo. It gives rise to cartilage, muscle, bone, blood, kidneys, gonads and their ducts, and connective tissue. It separates into two layers – an outer somatic and an inner splanchnic mesoderm, separated by… …   The new mediacal dictionary


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