In the blood supply of the heart, the right coronary artery (RCA) is an artery originating above the right cusp of the aortic valve, at the right aortic sinus in the heart. It travels down the right coronary sulcus, towards the crux of the heart. It gives off many branches, including the sinoatrial nodal artery, right marginal artery, posterior interventricular artery, conus artery, and atrioventricular nodal branch. It contributes the right side of the heart, and parts of the interventricular septum.
Right coronary artery
Aorta and coronary arteries at autopsy. The proximal portion of the RCA and its ostium can be seen at the lower left.
Fetal heart - right coronary artery
The papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole.
Opened chambers of the heart displaying papillary muscles and chordae tendineae
Papillary muscles and chordae tendineae
Papillary muscles and chordae tendineae
Papillary muscles. Deep dissection.