The circulatory system consists of one heart, five liters of blood, and approximately 96,000 kilometers of blood vessels, responsible for transporting nutrients and waste throughout the body.

In each cubic millimetre of blood, there are more than five million red blood cells, thousands of white cells and 250,000 to 450,000 platelets for blood clotting. Every second, 2.5 million new red ...

Well, the blood has to be kept moving around all the time because it's the body's delivery system ... different cells with different jobs. Some cells do repairs if you get a cut. Red blood ...

Q: My fiance and I plan to have kids someday. I was wondering if it would be beneficial to keep our babies’ umbilical cords, ...

ferrying oxygen isn’t the only function of red blood cells. In a study published today (October 20) in Science Translational Medicine, researchers show that these cells, the most abundant in ...