Assertion: vein's artery | /r/HasProperty | circle of willis
Facets:
Source sentences:
text: > R/L common carotid artery> external or internal carotid artery> (temporal artery if external) (Circle of Willis if internal)> cap beds> external or internal jugular vein> (R/L subclavian if external jugular) >
text: At the base of the brain, the carotid and vertebrobasilar arteries form a circle of communicating arteries known as the Circle of Willis.