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Our circulatory system is a closed one. This means that the blood stays in the heart chambers and vessels and does not leave them to circulate in the body cavity. There are three types of vessels: arteries, veins, and capillaries. Arteries carry blood away from the heart, veins carry blood towards the heart and capillaries are the site of nutrient and gas exchange between the blood and the body's cells.

You are responsible for identifying a set of arteries and veins in the cat. Remember this as you begin your dissection: tracing blood vessels is like driving in Tampa. Every time you get to an intersection, the names change. For example, Busch Boulevard crosses 56th Street and becomes Bullard Parkway. The superior vena cava crosses the diaphragm and becomes the inferior vena cava. Or, the right brachiocephalic artery crosses the intersection of the right common carotid and becomes the right subclavian artery. See what I mean?

Right lung Heart Left lung Diaphragm Aortic arch Brachiocephalic artery (right only) Right subclavian artery Superior vena cava vein Left brachiocephalic vein Left subclavian vein Left axillary vein Left external jugular vein Right brachiocephalic vein Right subclavian vein Right axillary vein Right common carotid artery Right external jugular vein Left common carotid artery Larynx Trachea Left subclavian artery Right subclavian vein Right brachiocephalic vein Superior vena cava Left brachiocephalic vein Left external jugular vein Left subclavian vein Left axillary vein Right external jugular vein Right common carotid artery Larynx Trachea Trachea Esophagus Left common carotid artery Trachea Right common carotid Left common carotid artery Right external jugular vein Left external jugular vein Superior vena cava vein Right brachiocephalic vein Right subclavian vein Left brachiocephalic vein Left subclavian vein Left axillary vein Right axillary vein Right common carotid artery Left common carotid artery Left external jugular vein Right external jugular vein Trachea Heart Aortic arch Left subclavian artery Brachiocephalic artery (right only) Right subclavian artery Superior vena cava vein Right brachiocephalic vein Right external jugular vein Right subclavian vein Right common carotid artery Trachea Left common carotid artery Left brachiocephalic vein Left subclavian vein Left external jugular vein Right lung Left lung