Bulbus cordis 4332825 197685053 2008-03-12T09:46:39Z Dono 748890 fix link {{Infobox Embryology | Name = Bulbus cordis | Latin = | GraySubject = 135 | GrayPage = 513 | Image = Gray466.png | Caption = Heart showing expansion of the [[atria]]. | Image2 = Gray469.png | Caption2 = Diagrams to illustrate the transformation of the bulbus cordis. (Keith.) Ao. [[Truncus arteriosus]]. Au. [[Atrium (heart)|Atrium]]. B. Bulbus cordis. RV. [[Right ventricle]]. LV. [[Left ventricle]]. P. [[Pulmonary artery]].| System = | CarnegieStage = 9 | Precursor = | GivesRiseTo = smooth parts of [[right ventricle]], [[left ventricle]] | MeshName = | MeshNumber = | DorlandsPre = b_26 | DorlandsSuf = 12200235 | }} When the developing [[heart]] assumes its S-shaped form, the '''bulbus cordis''' lies ventral to the [[primitive ventricle]]. Together, the bulbus cordis and the primitive ventricle give rise to the [[Ventricle (heart)|ventricle]] of the formed [[heart]]. The adjacent walls of the bulbus cordis and ventricle approximate, fuse, and finally disappear, and the bulbus cordis now communicates freely with the [[right ventricle]], while the junction of the bulbus with the [[truncus arteriosus (embryology)|truncus arteriosus]] is brought directly ventral to and applied to the [[atrial canal]]. By the upgrowth of the [[ventricular septum]] the bulbus cordis is in great measure separated from the [[left ventricle]], but remains an integral part of the right ventricle, of which it forms the [[conus arteriosus|infundibulum]]. ==Additional images== <gallery> Image:Gray460.png|Head of chick embryo of about thirty-eight hours’ incubation, viewed from the ventral surface. X 26 Image:Gray461.png|Diagram to illustrate the simple tubular condition of the heart. Image:Gray462.png|Heart of human embryo of about fourteen days. Image:Gray977.png|Human embryo about fifteen days old. Brain and heart represented from right side. Digestive tube and yolk sac in median section. </gallery> ==External links== * {{EmbryologyTemple|Heart98/heart97b/sld023}} * {{EmbryologyUNC|cardev|017}} * {{LoyolaMedEd|GrossAnatomy/thorax0/Heart_Development/AtrioVent.html}} {{Gray's}} {{Development of circulatory system}} [[Category:Embryology]] {{developmental-biology-stub}}