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.

Reference Article: Facts about the human circulatory system. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The circulatory system ...

The circulatory system includes the heart ... or about a tenth of the diameter of a human hair. Red blood cells are about the same size as the capillaries through which they travel, so these ...