Blood is pumped from the left ventricle through the aorta(1), which is visible behind the pulmonary artery. As the aorta arches to the left side of the pig (your right, remember) it gives rise to two major arteries (in humans it would be three). The larger brachiocephalic artery(2) gives rise first to the right subclavian artery(3) and then to the right carotid(4) and left carotid arteries(5). In humans the left carotid has its own branch directly from the aortic arch.
The second branch from the aorta is the left subclavian, which feeds the left arm and shoulder.
All of these arteries carry oxygenated blood under high pressure to anterior systems of the pig.
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