KLAUS GULDBRANDSEN / SCIENCE PHOTO LIBRARY KLAUS GULDBRANDSEN / SCIENCE PHOTO LIBRARY
Blood bank. Technician removes a tray holding samples of frozen blood from a cold storage facility which uses liquid nitrogen as a refrigerant. Freezing, or cryo-preservation, is a means of storing blood for future use in transfusions. Freezing and controlled thawing of blood is also used to produce cryoprecipitates, residues which contain high levels of a desired blood component. Photograph of a facility for storing blood from the umbilical cord of pregnant women in Milan, Italy.
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