and a human heart beats more than 3 billion times in an average lifespan. But among the most impressive systems of the body is the musculoskeletal system and all its muscles, ligaments ...

Scientists have found a way to use spinach to build working human ... mini heart, the team sent fluids and microbeads through its veins to show that blood cells can flow through this system.

The heart has long been thought to be controlled solely by the autonomic nervous system, which transmits ... that exhibits strong similarities to human heart rate and overall cardiac function.

the heart system of every military is its people. The focus of the U.S. Army Aeromedical Research Laboratory’s Human Center of Gravity, or H-COG, Symposium, too, was the people. “We are ...

After a lengthy essay considering the antiquity of man—and once again stressing that the human physical form ... Unlike the closed system of the heart, the spiraling lines of atoms and molecules ...

How Does the Heart Work? As the heart beats, it pumps blood through a system of blood vessels called the circulatory system. The vessels are elastic tubes that carry blood to every part of the body.