Sinus venosus
Cavity in the hearts of chordates / From Wikipedia, the free encyclopedia
This article is about the embryological structure. For the heart defect, see Atrial septal defect § Sinus venosus atrial septal defect.
The sinus venosus is a large quadrangular cavity which precedes the atrium on the venous side of the chordate heart.[1][verification needed]
Quick Facts Details, Carnegie stage ...
Sinus venosus | |
---|---|
Details | |
Carnegie stage | 9 |
System | Cardiovascular system |
Identifiers | |
Latin | sinus venosus cordis |
TA98 | A12.0.00.016 |
TA2 | 3911 |
TE | venosus_by_E5.11.1.3.2.0.4, E5.11.1.5.1.0.1 E5.11.1.3.2.0.4, E5.11.1.5.1.0.1 |
FMA | 70303 |
Anatomical terminology |
Close
In mammals, the sinus venosus exists distinctly only in the embryonic heart where it is found between the two venae cavae; in the adult, the sinus venosus becomes incorporated into the wall of the right atrium to form a smooth part called the sinus venarum which is separated from the rest of the atrium by a ridge called the crista terminalis. In most mammals, the sinus venosus also forms the sinoatrial node and the coronary sinus.[1][verification needed]