Capillaries, on the other hand, are so small that it takes ten of them to equal the thickness of a human hair. Your body has about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood ...

The human body is a biological marvel, capable of fascinating and sometimes little-known feats. If you think you know ...

Day and night, the muscles of your heart contract and relax to pump blood throughout your body. When blood returns to the heart, it follows a complicated pathway. If you were in the bloodstream ...

Find out about the different stages of a human life cycle and how we change ... circulatory system takes oxygen around the body. What is in your blood? Discover how blood vessels and blood cells ...

A high-end medical practice is offering clients the purported service of scrubbing their blood of microplastics ... into his own — where all of the body's plasma is removed and replaced ...

Although iron is the most abundant metal in our body, traces of gold can be found in the human body in several different places. Studies have confirmed the presence of gold in human blood.