GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Reversed organs. Coloured frontal X-ray of a male with situs inversus totalis ('completely inverted arrangement'). This inherited condition, also named situs transversus or situs inversus with dextrocardia, has all the internal organs in opposite positions to their normal ones. Here, the heart (light pink, centre left) is on the right, a defect called dextrocardia ('right heart'). The stomach and spleen are also on the right, and the liver and gall bladder (lower right) are on the left. Although less than 1 in 10,000 people are born with this condition, most live a normal life without disability.
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