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Heart valve and strings, SEM

Heart valve and strings, SEM

C009/7862

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50.5 MB (50.0 MB compressed)

4850 x 3638 pixels

41.1 x 30.7 cm ⏐ 16.2 x 12.1 in (300dpi)

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Credit

SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY

Caption

Heart valve and strings, coloured scanning electron micrograph (SEM). This is the mitral valve (upper left), controlling the blood flow between two of the heart's chambers, the left atrium and the left ventricle (seen here). The heart strings (thread-like structures) are known as the chordae tendineae, and are controlled by the papilliary muscles. The structures at centre, known as trabeculae carneae, are muscular, columnar protrusions found on the internal surface of the ventricles.

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