semi-lunar valves
aorta
The valve on the aorta (the vessel taking blood away from the heart) is called the "aortic valve".
The great artery leading from the heart to the body is called the aorta.
The left ventricle pumps blood into the aorta through the aortic semi-lunar valve.
descending aorta
descending aorta
descending aorta
Because there are crescent shaped, like half moons :)
Abdominal aorta to the Renal arteries.
aorta
A tortuous thoracic aorta is an aorta that is twisted or misshapen in some people. This can lead to discomfort in some people, but no effects at all in others.
The Rock of Gibraltar