Dun Aengus. Dun DÃºn aengus is the most famous of several prehistoric forts on The Aran, islands Of. Co. Galway. Ireland it is located On inishmore at the edge of a-100 metre high. Cliff Dun dÃºn aengus is an important archaeological site that also offers a. spectacular view
The heart receives its own supply of blood from the coronary arteries. Two major coronary arteries branch off from the aorta near the point where the aorta and the left ventricle meet. These arteries and their branches supply all parts of the heart muscle with blood.
The heart does not gather oxygen or nutrients from the blood flowing inside it. Instead, it receives blood from coronary arteries that eventually carry blood into the heart muscle. Approximately 4 - 5 percent of the heart's blood output goes to the coronary arteries. The heart also has veins to collect oxygen-poor blood from the heart muscle. Most major veins of the heart drain into the coronary sinus. The sinus opens into the right atrium. A blockage in one of the coronary arteries causes coronary artery disease.