JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY
Umbilical cord blood. Gloved hands holding a bag containing blood harvested from a baby's umbilical cord for the blood stem cells it contains. These cells can be used to treat diseases like leukaemia, a cancer that causes the overproduction of abnormal white blood cells. Blood stem cells can specialize into red blood cells, white blood cells and platelets. The umbilical cord connects the foetus to the placenta. The donated blood is stored in liquid nitrogen. Photographed at the London Cord Blood Bank, part of the National Blood Service, England.
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