<prompt> All the following vessels end directly in the right atrium exceptCoronary sinusOblique vein of left atriumAnterior cardiac veinVenae cordis minimae  <response>: Superior vene cava, inferior vene cava,coronary sinus, anterior cardiac veins ,vene cordis minimi. these are the veins that directly open to right atrium. BD CHAURASIAS HUMAN ANATOMY.VOLUME 1.6 TH EDITION.PAGE NO 255 