Fig. 2From: Angiographic anatomy of the extracranial and intracranial portions of the internal carotid arteries in donkeysLateral angiogram of the left carotid arterial tree of a donkey shows variation from the common pattern of this structure where the occipital and the internal carotid arteries share a common trunk (black arrow). 1 common carotid artery; 2 external carotid artery; 3 internal carotid artery; 4 occipital arteryBack to article page