Bulbus Cordis

The bulbus cordis (also known as the conotruncus) lies ventral to the primitive ventricle after the developing heart assumes its S-shaped form. Together, the bulbus cordis and the primitive ventricle give rise to the 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 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 infundibulum.

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Other articles related to "bulbus cordis, cordis":

Truncus Arteriosus (embryology)
... The truncus arteriosus and bulbus cordis are divided by the aorticopulmonary septum ... The caudal end of the bulbus cordis gives rise to the smooth parts (outflow tract) of the left and right ventricles (aortic vestibule conus arteriosus respectively) ... The cranial end of the bulbus cordis (also known as the conus cordis) gives rise to the aorta and pulmonary trunk with the truncus arteriosus ...
Aortic Septum
... (3) Two endocardial thickenings—anterior and posterior—develop in the bulbus cordis and unite to form a short septum this joins above with the aortic septum and below with the ventricular septum ... septum in such a way as to bring the bulbus cordis into communication with the pulmonary artery, and through the latter with the sixth pair of aortic arches while the left ...