30.0 MB (2.5 MB compressed)
3000 x 3500 pixels
25.4 x 29.7 cm ⏐ 10.0 x 11.7 in (300dpi)
MEHAU KULYK / SCIENCE PHOTO LIBRARY MEHAU KULYK / SCIENCE PHOTO LIBRARY
Human kidneys and spleen. Coloured three- dimensional computed tomography (CT) scan of two human kidneys (centre left and right) and the spleen (upper right). The kidneys are responsible for excreting nitrogenous waste from the blood. The spleen is important in defending against infection. CT scans use X-rays to form slice images of the body. These are built into a three- dimensional image by computer.
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