<prompt> The coronary sinus -Lies in anterior part of the coronary sulcusEnds in right atriumHas venae cordis minimae as its tributariesDevelops from right anterior cardinal vein  <response>: Development of coronary sinus is from the body and left horn of sinus venosus. It lies in the posterior part of the coronary sulcus and drains into the right atrium. Though the besian veins venae cordis minimae drain directly into the right atrium, the the besian valves are guarding the opening of coronary sinus into the right atrium. 