The coronary sinus
Coronary Sinus is the largest vein of hea.it ends by opening to posterior of Right atrium. <img src=" /> BD CHAURASIA'S HUMAN ANATOMY,VOL:1,6TH EDITION,PAGE NO:266
Lies in anterior pa of the coronary sulcus
Ends in right atrium
Has venae cordis minimae as its tributaries
Develops from right anterior cardinal vein
Thorax