London, United Kingdom
Japanese Pilchard Heart Valve, Sem
Science Photo Library
Photograph - Photograph
Fish heart valve. Coloured scanning electron micrograph (SEM) of a view from the ventricle of the heart to the atrium in a Japanese pilchard (Sardinops melanostictus). Between the two chambers is a heart valve (centre), which prevents the back-flow of blood. The fish heart pumps deoxygenated blood to the gills where it is oxygenated and then flows to the rest of the body.
March 6th, 2014
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