Abstract: Anatomic characteristics of the cardiovascular system can reflect different supplying blood ability to tissues and organs. The Cerebral Arterial System mainly contributes to supplying blood to the brain tissue. In present study, researchers examined the morphological features and internal diameters of arteries and analyzed supplying blood ability of the Cerebral Arterial System of the yak and Chinese cattle with the Corrosion Casting technique and the methods of comparative anatomy. Results showed that general arrangements and calibers of most arteries of the Cerebral Arterial System between two species were similar but the anterior-posterior diameter of the cerebral arterial circle was shorter and interval distance of the cerebral carotid artery was closer in the yak. The yak has more developed internal arterial vessels and epidural retia mirabile and the blood volume of the Cerebral Arterial System in the yak showed anatomical superiority. Researchers deduced that the anatomic peculiarities of the cerebral arterial circle and relatively developed internal arterial vessels in the yak were beneficial to supplying more blood to the brain. The yak’s developed epidural retia mirabile was advantageous of the blood preservation, exchange and complement and it might play a vital role in buffering and regulating cerebral blood flow so as to meet demand of the yak’s brain for blood supply in the plateau areas.
X.R. Wang, Y. Liu, T.F. Guo and J.P. Wu, 2012. Anatomic Peculiarities of the Cerebral Arterial System and Blood Supply in the Yak (Bos grunniens). Journal of Animal and Veterinary Advances, 11: 2533-2539.