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. Water ...

This series of Special Features takes an in-depth look at the science behind some of the most debated nutrition-related topics, weighing in on the facts and debunking the myths. Share on Pinterest ...

Moreover, the human body cannot eat without the head ... that you need a lot of pressure to flow blood through," Kunkel says. "They have an open circulatory system, which there's much less pressure in ...