Every day, your heart pumps about 10 pints of blood 60,000 miles around your body through your circulatory system. That system is made up of blood vessels, the tubes that carry blood throughout your ...

The calf muscles play a vital role in blood circulation. They are often called the body's second heart. Strong calf muscles ...

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, ...

Every second, millions of blood cells are produced in the human body, and about 90% of the cells replaced daily are blood ...

Every year, millions of people develop dangerous blood clots in their legs without realizing the life-threatening risk growing within their bodies. These formations, medically known as deep vein ...