The term 'IMPORTANT ARTERY' refers to two major arteries in the human body: the carotid and the AORTA. The carotid artery is a major artery located in the neck that supplies oxygenated blood to the brain. The AORTA is the largest artery in the body and is located in the chest, carrying oxygenated blood from the heart to the rest of the body. Both of these arteries are essential for proper circulation and are therefore considered important.