Bulbus arteriosus
The Bulbus arteriosus , also Bulbus cordis, is a structure made of several tissues, which consists of three layers and through which the blood leaves the heart . The bulbus arteriosus is a pear-shaped chamber that acts as a reservoir and maintains the continuous flow of blood into the gill arches . The term Bulbus arteriosus is used particularly in fish .
It lies ventral to the primitive ventricle after the developing heart has assumed its S-shape. Together, the cord and the primitive ventricle form the ventricles of the formed heart. The upper end of the bulbous cordis is also known as the conotruncus.
The adjoining walls of the cord and ventricle converge, merge and finally disappear, and the cord now communicates freely with the right ventricle, while the connection of the bulb with the arterial trunk is brought and placed directly ventrally into the atrial canal.
The bulbus cordis is largely separated from the left ventricle by the growth of the ventricular septum, but remains an integral part of the right ventricle, of which it forms the infundibulum.
Individual evidence
- ↑ Norman Hu, David Sedmera, H. Joseph Yost, Edward B. Clark: Structure and function of the developing zebrafish heart . In: The Anatomical Record . tape 260 , no. 2 , 2000, ISSN 1097-0185 , p. 148–157 , doi : 10.1002 / 1097-0185 (20001001) 260: 23.0.CO; 2-X ( wiley.com [accessed May 23, 2020]).
- ↑ Sherman, Lawrence S., Potter, S. Steven., Scott, William J. (William James), 1937-: Human embryology . 3rd ed. Churchill Livingstone, New York 2001, ISBN 0-443-06583-7 .