Bulbus cordis
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{{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}}