Red blood cells carry oxygen from the lungs to every other organ, and blood-forming stem cells must make about 200 billion new red blood cells each day to keep the oxygen flowing. For many years, ...

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 ...

Hidden Guests” explores how the emerging field of microchimerism is upending medicine, genetics, and our sense of self.

How do cells and protein molecules respond to stress as they travel through blood vessels? Could resulting changes to these biological components impact how diseases are spread? Researchers at ...

A fatal genetic incompatibility between Neanderthals and modern humans may have hastened the extinction of our ancient cousins, new research suggests. Researchers found that different versions of a ...

Iron is an important mineral that your body needs to make hemoglobin, a protein in red blood cells. Red blood cells help carry oxygen throughout your body. You get iron from certain foods, like red ...