The<unk>  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.
Coronary sinus
Coronary sulcus
Aortic sinus
Thoracic aorta
Atrioventricular canal
Ascending aorta
Pulmonary valve
Atrioventricular node