Paraxial mesoderm 4781927 164108807 2007-10-12T19:12:49Z 128.104.117.175 {{Infobox Embryology | Name = {{PAGENAME}} | Latin = | GraySubject = 6 | GrayPage = 50 | Image = Image19.png | Caption = Transverse section of a chick embryo of forty-five hours’ incubation.<BR>* ''[[Chordamesoderm]]:'' yellow, at [[notochord]].<BR>* ''Paraxial mesoderm:'' red, at [[somite]].<BR>* ''[[Intermediate mesoderm]]:'' purple, near [[Wolffian duct]].<BR>* ''[[Lateral plate mesoderm]]:'' purple, near "Somatic mesoderm" and "Splanchic mesoderm". | Image2 = Gray18.png | Caption2 = Chick embryo of thirty-three hours’ incubation, viewed from the dorsal aspect. (Paraxial mesoderm labeled at left.) | System = | CarnegieStage = 9 | Precursor = | GivesRiseTo = [[somitomere]], [[head mesoderm]] | MeshName = | MeshNumber = | DorlandsPre = m_11 | DorlandsSuf = 12527037 | }} '''Paraxial mesoderm''' is the area of [[mesoderm]] that forms just lateral to the [[neural tube]] on both sides. It gives rise to the [[somitomere]]s/[[somite]]s and mesoderm of the [[branchial arches]]. *Somites form the [[vertebral column]] [[dermis]] and [[skeletal muscle]] *Branchial arches will develop into [[facial muscle]] and cartilage, plus other structures. * eventually differentiates into the axial skeleton, skeletal muscle, part of the dermis * almost immediately as it is formed, somitomeres develop. * starts with several pairs in the cranial region, and increasingly more proceed to develop towards the caudal region. * The original seven pairs form the straited muscles of head and neck, which develop within the pharyngeal arches * The other somitomeres develop further, to form discrete blocks called somites, starting at approximately 20 days. ==External links== * [http://www.ncbi.nlm.nih.gov/books/bv.fcgi?db=Books&rid=dbio.section.3455 Overview at nih.gov] * [http://sprojects.mmi.mcgill.ca/embryology/earlydev/week4/somites.html Diagram and overview at mcgill.ca] * [http://connection.lww.com/Products/sadler/images/figurelarge5-9.jpg Diagram at lww.com] {{developmental-biology-stub}} {{Gray's}} {{Embryology}}[[Category:Embryology]]