Resin cast of the coronary arteries of the heart in front view, showing the ascending aorta (the large vessel at top left). Branching top and bottom from this are the left and right coronary arteries respectively. Each coronary artery gives off 2 main branches - the circumflex and anterior interventricular from the left (at top of heart), the marginal & posterior interventricular from the right (at bottom left). The resin cast was made by pumping liquid resin into the heart's blood vessels, allowing it to set, then removing any extraneous tissue with sulphuric acid.

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