COLIN CUTHBERT / SCIENCE PHOTO LIBRARY COLIN CUTHBERT / SCIENCE PHOTO LIBRARY
Blood samples. Rows of sample tubes containing donated blood. The blood has been separated into blood cells (dark red) and plasma (pale orange liquid) by spinning it at high speed in a centrifuge. Donated blood must be tested for infectious micro-organisms, as well as having its blood group determined.
Model release not required. Property release not required.