A chest pain scare, a scary number on a blood test, or hearing about someone our age having a heart attack. That’s when it ...

Scientists have uncovered a new biological mechanism behind tissue and organ damage in low-oxygen conditions like heart attacks, strokes, and severe COVID-19. Bursting red blood cells—not ...

Blood is said to be "positive" or "negative" based on whether there are proteins on the red blood cells. If your blood has proteins, you're Rhesus, or Rh, positive.

Red blood cells are complex — there's much more to blood types than A, B and O. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Many ...

Each day, our hearts beat 100,000 times to pump eight pints of blood (give or take) around our body, delivering oxygen and nutrients so that our organs and muscles can work properly. It’s an ...