Your Blood Vessels Could Circle Earth Four Times Laid end to end, an adult's blood vessels could circle Earth's equator four ...

Scientists have engineered the first fully human-made bone marrow system, recreating the complex mix of cells, vessels, and nerves that normally live deep within our bones. This breakthrough lets ...

Memory T cells are a special type of white blood cell that "remember" past infections and vaccines, helping our bodies to ...

University of Cambridge scientists have used human stem cells to create three-dimensional embryo-like structures that replicate certain aspects of very early human development—including the production ...

When the medical world was agog over the discovery that blood circulates through the body, imaginative surgeons tried to transfuse sheep’s blood into human patients weakened by too generous ...