The coronary sinus is a collection of veins joined together to form a large vessel that collects blood from the myocardium of the heart. It is present in humans and other animals. It delivers deoxygenated blood to the Right atrium in conjunction with the superior and inferior vena cava.
Wikipedia
The coronary sinus orifice is found in the triscupid valve
coronary sinus
The great and middle cardiac veins drain blood into coronary sinus. The coronary sinus is responsible for draining blood from the anterior ventricles.
To drain the tissues of the heart and empty into the coronary sinus
To drain the tissues of the heart and empty into the coronary sinus
The coronary veins drain into the coronary sinus, which in turn drains into the right atrium.
The coronary sinus is a collection of veins joined together to form a large vessel that collects blood from the myocardium of the heart. It is present in humans and other animals. It delivers deoxygenated blood to the Right atrium in conjunction with the superior and inferior vena cava.Wikipedia
Superior vena cavaInferior vena cavacoronary sinus
Coronary sinus, in turn empties into the right atrium Coronary sinus, in turn empties into the right atrium Coronary sinus, in turn empties into the right atrium Coronary sinus, in turn empties into the right atrium
coronary sinus, ivc,svc
The Great Coronary Vein drains the muscles of the heart. It ascends the anterior interventricular sulcus (groove between the two ventricles) around the left coronary groove (groove between the left atrium and left ventricle) and into the coronary sinus on the right atrium of the heart.
The structure you are referring to is likely the coronary sinus. It is a collection of veins that drain deoxygenated blood from the heart muscle itself back into the right atrium of the heart. It serves as the main venous drainage for the heart.