MEHAU KULYK / SCIENCE PHOTO LIBRARY MEHAU KULYK / SCIENCE PHOTO LIBRARY
Human heart. Historical artwork of the human heart in dorsal (top) and ventral (bottom) view. The main body of the heart (right) is a hollow, muscular sac comprising two atria and two ventricles. At the top of the heart are various blood vessels (left) by which blood enters and leaves the heart. The atria and ventricles contract to force blood out of the heart in the aorta and pulmonary artery. The heart muscle is supplied with blood by coronary arteries, which branch across its surface. This artwork is by Frederik Ruysch (1637-1731) and was published in 1704.
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