DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Samples in a pathology laboratory. Colour-coded samples that are being analysed in a pathology laboratory. Samples of human tissue and blood are analysed here to help diagnose different diseases. Blood samples (purple cap) are analysed for levels of components such as cholesterol and glucose, for pathogens such as bacteria and viruses, and to determine a person's blood group. Other blood tests include coagulation (blood clotting) analysis, performed on the samples with the blue caps. The other colours indicate the use of other tests.
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