Rita, 18, was born with sickle cell disease, a condition that means she relies on blood donations.

Every second of every day, the human body replaces roughly two million red blood cells that have reached the end of their ...

Blood clotting is one of the body's oldest survival mechanisms-a biological defense that has protected humans from dangerous ...

When blood is donated, it is rarely used as whole blood. Instead, blood banks separate it into different components so that ...

Explore the shape, structure, and movement of red blood cells under the microscope in this fascinating science clip.

Northwestern Medicine scientists have discovered that the hormone FGF23 reduces the production of red blood cells and may ...

Scientists have long known that people living at high altitudes, where oxygen levels are low, have lower rates of diabetes than people living closer to sea level. But the mechanism of this protection ...

The immune system consists of inflammatory and regulatory T cells (Tregs) that promote or dampen immune activity, respectively. These cells react to specific antigens that specialized cells like ...

Curious about what happens after donating blood? Expert explains how your body recovers, replaces lost blood, and the health ...

Your blood cells work tirelessly to keep you alive, carrying oxygen throughout your body and fighting off infections. But hidden in your daily meals are foods that can silently compromise these vital ...