MONICA SCHROEDER / SCIENCE PHOTO LIBRARY MONICA SCHROEDER / SCIENCE PHOTO LIBRARY
Illustration of the anatomy of the heart. Labelled are the following: aorta (large red tube at top), pulmonary trunk (blue tube right of aorta), pulmonary valve (bottom of pulmonary trunk), left atrium (opening below pulmonary trunk), mitral valve (below left atrium), aortic valve (in centre), right atrium (opening on left side), tricuspid valve (inlet below right atrium), and the left and right ventricle's (at bottom).
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