File:Somite cartoon2.png

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2. Somite Development - Early Somite

Paraxial mesoderm towards the rostral (cranial) end, begins to segment forming the first somite.
Somites are then sequentially added caudally in pairs.
The somite surface cells undergo a mesenchymal to epithelial transition, forming a transient epithelial covering on each somite.
The mesoderm under the surface remains as mesenchyme and proliferates.
The early forming somites have a cavity (somitocoel) in their core that is lost as the somite matures.

Note - the cartoons show just the embryo righthand side mesoderm development (the same events occur on the lefthand side).

Cite this page: Hill, M.A. (2024, April 20) Embryology Somite cartoon2.png. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Somite_cartoon2.png

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:59, 16 May 2014		400 × 300 (16 KB)	Z8600021 (talk \| contribs)
	10:41, 10 August 2009		216 × 181 (3 KB)	MarkHill (talk \| contribs)	Somite Development cartoon 2 Paraxial mesoderm towards the rostral end, begins to segment forming the first somite. Somites are then sequentially added caudally. The somitocoel, is a cavity forming in early somites, which is lost as the somite matures.

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