Internal carotid artery

The internal carotid artery arises from the common carotid artery, often together with the occipital artery (especially in Pigs and Ruminants). It enters the cranial cavity through the carotid canal (Carnivorous), the jugular foramen ((Pigs), the petro-occipital fissure (Ruminants), or the carotid incisure (Horses). The extracranial segment is regressed in the adult Feline, Suidae and Ruminant.