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Intermediate mesoderm

Intermediate mesoderm
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Transverse section of a chick embryo of forty-five hours’ incubation.
* Chordamesoderm: yellow, at notochord.
* Paraxial mesoderm: red, at somite.
* Intermediate mesoderm: purple, near Wolffian duct.
* Lateral plate mesoderm: purple, including "Somatic mesoderm" and "Splanchic mesoderm".
Latin mesenchyma intermedium
Gives rise to Wolffian duct
Gray's p.50
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Anatomical terminology

Intermediate mesenchyme or intermediate mesoderm is a type of mesoderm (an embryological tissue) that is located between the paraxial mesoderm and the lateral plate.

It develops into the part of the urogenital system (kidneys and gonads), as well as the reproductive system.

  • forms of urogenital system
  • series of short evaginations from each segment grows dorsally caudally
  • vestiges of the future kidney, the pronephros briefly appears.
  • pronephric duct arises in the intermediate mesoderm just ventral to the anterior somites
  • grows caudally until it becomes the cloaca.
  • it is distinct from the lateral mesoderm, as it is not influenced by the secretion of BMP-4 by the ectoderm, possibly due to the lack of receptors.

See also


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

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