The crossword solution for the term SOME ARTERIES is ROADS. Arteries are blood vessels that carry oxygen-rich blood away from the heart to the rest of the body. They are part of the circulatory system and are usually larger and have thicker walls than veins. Some arteries, such as the aorta, are very large and can be seen and felt in the body. Other arteries, such as those in the brain, are much smaller and can only be seen under a microscope.