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50.7 MB (4.5 MB compressed)
4875 x 3638 pixels
41.1 x 30.7 cm ⏐ 16.2 x 12.1 in (300dpi)
SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Heart valve surface, coloured scanning electron micrograph (SEM). Heart valves help regulate the flow of blood between heart chambers, and are smooth, thin flaps of tissue. This is the surface of the tricuspid valve, which controls the flow of blood between the right atrium and the right ventricle.
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