Bulbus cordis

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Bulbus cordis
Gray466.png
Heart showing expansion of the atria.
Gray469.png
Diagrams to illustrate the transformation of the bulbus cordis. (Keith.) Ao. Truncus arteriosus. Au. Atrium. B. Bulbus cordis. RV. Right ventricle. LV. Left ventricle. P. Pulmonary artery.
Details
Latin Bulbus cordis
Carnegie stage 9
Gives rise to smooth parts of right ventricle, left ventricle
Identifiers
Gray's p.513
Dorlands
/Elsevier
b_26/12200235
Anatomical terminology

The bulbus cordis (the bulb of the heart) 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 ventricles of the formed heart. The superior end of the bulbus cordis is also called the conotruncus.[1]

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.

Additional images[edit]

References[edit]

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

  1. ^ Larsen, William J (2001). Human Embryology (3rd ed.). Elsevier. p. 160. ISBN 0-443-06583-7. 


External links[edit]