File:Somite cartoon5.png: Difference between revisions

Latest revision as of 18:32, 16 May 2014

5. Somite Development - Loss of the Somite

Neural crest cells will migrate beside and through somite and finally the somite structure is lost and spreads as the 3 component parts.

Sclerotome - from the left and right somite at each level will engulf the notochord. This transient structure is then resegmented to form the axial skeleton, vertebra and intervertebral discs.
Dermatome - forms a thick band in the dorsal region of the embryo. This will then spread ventrally under the surface ectoderm (epidermis) to form the dermis of the skin.
Myotome - from the ventrolateral lip of the dermomyotome, spreads both dorsally and ventrally to eventually form skeletal muscle cells.
1. Dorsally - the epimere which in turn forms epaxial muscles, located behind the vertebral column.
2. Ventrally - the hypomere, which in turn forms hypaxial muscles, located on the ventral body wall and somites at the level of the limbs will also form limb muscles.

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

Somite Cartoons
paraxial
early somite
sclerotome and dermomyotome
dermatome and myotome
somite spreading

Cite this page: Hill, M.A. (2024, May 27) Embryology Somite cartoon5.png. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Somite_cartoon5.png

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	18:01, 16 May 2014		400 × 300 (27 KB)	Z8600021 (talk \| contribs)
	10:43, 10 August 2009		270 × 209 (6 KB)	MarkHill (talk \| contribs)	Somite Development cartoon 5 Neural crest cells migrate beside and through somite. The myotome differentiates to form 2 components dorsally the epimere and ventrally the hypomere, which in turn form epaxial and hypaxial muscles respectively. The bulk of

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Unique ID of original document	1D6371DA4C1B5D65A1E8526A0B0DC4D8
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-==Somite Development cartoon==
+==5. Somite Development - Loss of the Somite==
-The myotome differentiates to form 2 components dorsally the '''epimere''' and ventrally the '''hypomere''', which in turn form '''epaxial''' and '''hypaxial''' muscles respectively.
+Neural crest cells will migrate beside and through somite and finally the somite structure is lost and spreads as the 3 component parts.
-The bulk of the trunk and limb muscle coming from the hypaxial mesoderm.
+# '''Sclerotome''' - from the left and right somite at each level will engulf the notochord. This transient structure is then resegmented to form the axial skeleton, vertebra and intervertebral discs.
+# '''Dermatome''' - forms a thick band in the dorsal region of the embryo. This will then spread ventrally under the surface ectoderm (epidermis) to form the dermis of the skin.
+# '''Myotome''' - from the ventrolateral lip of the dermomyotome, spreads both dorsally and ventrally to eventually form skeletal muscle cells.
+## Dorsally - the '''epimere''' which in turn forms '''epaxial''' muscles, located behind the vertebral column.
+##  Ventrally - the '''hypomere''', which in turn forms '''hypaxial''' muscles, located on the ventral body wall and somites at the level of the limbs will also form limb muscles.
-Different structures will be contributed depending upon the somite level. Note that neural crest cells migrate beside and through somite.
+{{Somite cartoon}}
-:Links: [[:File:Somite cartoon1.png|mesoderm cartoon 1]] | [[:File:Somite cartoon2.png|mesoderm cartoon 2]] | [[:File:Somite cartoon3.png|mesoderm cartoon 3]] | [[:File:Somite cartoon4.png|mesoderm cartoon 4]] | [[:File:Somite cartoon5.png|mesoderm cartoon 5]] |
-[[Category:Mesoderm]]  [[Category:Somite]] [[Category:Notochord]]