Lateral plate mesoderm 4781874 215568321 2008-05-28T19:50:47Z DOI bot 6652755 Citation maintenance. You can [[WP:DOI|use this bot]] yourself! Please [[User:DOI_bot/bugs|report any bugs]]. {{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 = Gray31.png | Caption2 = Model of human embryo 1.3 mm. long.. (Splanchic mesoderm labeled at left, somatic mesoderm at top right.) | System = | CarnegieStage = 9 | Days = | Precursor = [[mesoderm]] | GivesRiseTo = [[somatopleure]], [[splanchnopleure]] | MeshName = | MeshNumber = | DorlandsPre = h_22 | DorlandsSuf = 12439212 | }} '''Lateral plate mesoderm''' (or '''hypomere''') is a type of [[mesoderm]] that is found at the periphery of the [[embryo]]. ==Division into layers== It will split into two layers, the somatic layer/mesoderm and the splanchnic layer/mesoderm * The ''somatic layer'' forms the future body wall. * The ''splanchnic layer'' forms the [[circulatory system]] and future [[gut wall]]. Spaces within the lateral plate are enclosed and forms the intraembryonic [[coelom]]. It is formed by the secretion of [[BMP-4]] by the ectoderm.<ref name="pmid9169844">{{cite journal |author=Tonegawa A, Funayama N, Ueno N, Takahashi Y |title=Mesodermal subdivision along the mediolateral axis in chicken controlled by different concentrations of BMP-4 |journal=Development |volume=124 |issue=10 |pages=1975–84 |year=1997 |pmid=9169844 |doi=}}</ref> ==Serosal mesoderms== Lateral plate mesoderm gives rise to the serosal mesoderms.<ref name="Larsen">{{cite book |author=Larsen, William J. |title=Essentials of human embryology |publisher=Churchill Livingstone |location=Edinburgh |year=1998 |pages= |isbn=0-443-07514-X |oclc= |doi=}}</ref> ::* forms a ventral layer associated with [[endoderm]], the [[splanchnopleuric]] mesoderm. This forms the viscera and heart ::*forms a dorsal layer associated with [[ectoderm]], the [[somatopleuric]] mesoderm. This forms the body wall lining and dermis. ::*Abdominal portion becomes contained in [[dorsal mesentery]], part of the serosal mesoderm. ::* When the two layers form, a cardiogenic plate is visible. Later, this will form the myocardial primordium, which will contribute to the tubular heart. ==Cavities== In the 4th week the coelom divides into [[pericardial]], [[pleural]] and [[peritoneal]] cavities.<ref name="Larsen"> </ref> ::* First partition: is the [[septum transversum]]. :::*This will be translocated later into the diaphragm and [[ventral mesentery]]. :::*Divides the coleom into primitive pericardial and peritoneal cavities ::* pleuropericardial folds appear on the lateral wall of primitive pericardial cavity, which will eventually cause a partition to form the pericardial and pleural cavities. ::*Communication between these partitions formed by the pericardioperitoneal canals. However, pleuroperitoneal membranes will grow to fuse with the septum transversarium to close off these canals. * At day 22, [[lung bud]] forms, remaining ensheathed in a splachnopleuric mesoderm ==See also== * [[Serous membrane]] ==External links== * {{EmbryologySwiss|hdisqueembry/triderm08}} * [http://www.palaeos.com/Vertebrates/Lists/Glossary/Early_Development.html Overview and diagram at palaeos.com] * [http://arnica.csustan.edu/embryo/Lectures/10_Lateral_plate_mesoderm_and_endod.htm Outline at csustan.edu] ==References== <references/> {{developmental-biology-stub}} {{Gray's}} {{Embryology}}[[Category:Embryology]] [[Category:Developmental biology]]