People with leukaemia could be helped by new research that sheds light on how the body produces its blood supply.
Scientists are a step closer to creating blood stem cells that could reduce the need for bone marrow transplants in patients with cancer or blood disorders.
This image shows the formation of blood stem cells inside the embryonic vessel called dorsal aorta. In green is shown secreted molecule called NOGGIN, which plays an important role in this process.
Credit: The University of Edinburgh