CRISTINA PEDRAZZINI / SCIENCE PHOTO LIBRARY CRISTINA PEDRAZZINI / SCIENCE PHOTO LIBRARY
Blood sample. Blood-filled microtube. This small volume of blood has been placed in the microtube to allow tests to be carried out. A common use of a microtube in blood analysis is placing a blood sample in a centrifuge and spinning the sample at high speed to separate out some of the different components of blood.
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