The circulatory system consists of one heart, five liters of blood, and approximately 96,000 kilometers of blood vessels, ...

Your daily habits impact blood flow more than you realize. Learn how small changes in movement, hydration, and sleep can ...

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 ...

Each 2.54 square centimetre (a square inch) of human skin has six metres (20ft) of blood vessels. Veins hold about 65 per cent of the body's blood and have one-way valves tohelp blood move.

For nine months, you were enveloped in the warm, comfortable world of your mother's womb. Your every need was taken care of. The placenta supplied you with oxygen from your mother's blood, so your ...

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 ...

There was no need for circulation. Basic Books ... called the “wine-dark sea”) and inferred that a similar to-and-fro motion of blood operated within the human body. Modern medicine would be ...