Add Yahoo as a preferred source to see more of our stories on Google. human red blood cells under microscope with two white blood cells When a pregnant woman had her blood sampled back in 1972, ...

Stem cells are precursors of a variety of different cells: They can turn into anything from blood to bone to muscle. Human blood stem cells, known as hematopoietic stem cells, are the forerunners of ...

The brain relies on real-time delivery of oxygen and nutrients through its microvasculature, which threads through neural tissue like electrical wires. While modern imaging technologies allow ...

A pregnant woman's blood sample taken in 1972 was mysteriously missing a surface molecule found on all other known red blood cells at the time. More than 50 years later, that strange absence finally ...