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.

Each 2.54 square centimetre (a square inch) of human skin has six metres (20ft ... pins and needles is caused by an impairment of blood circulation.

When the significance of the human circulatory system was finally established, it revolutionized the life sciences and ushered in modern medicine. The Greeks observed the ebb and flow of tides in the ...

A live water birth is shown and real life images combined with CGI to illustrate the anatomy and function of the circulatory system. This short film is from the BBC series, Inside the Human Body.

The human heart is a vital organ that pumps blood through the body. You probably don't even think about it, but your heart is always working — it beats about 100,000 times a day, which adds up ...

Cold toes, color changes, and swelling could be early signs of poor circulation. Here's how your toes signal cardiovascular ...

Veins between two capillary networks are portal systems. Closed circulatory system, but fluid constituents of blood leak out of capillaries and return to the heart by the second component of the ...

Poor circulation affects more than just your hands and feet. Learn how it might be impacting your brain, skin, and more.

This short film offers a look at respiration and a tour around the circulatory system and digestive system in the human body, through blood vessels and into mitochondria. There is a detailed ...

A new University of Miami study looked at forty years worth of data from across the Atlantic and found cooler waters in deep currents off the U.S. coast could be warming. The current, known as the ...