When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The circulatory system consists of three independent systems that work together: the heart ...

This system is comprised of a heart that acts as a pump and approximately 70,000 miles of blood vessels, evenly split between arteries (which carry blood from the heart to all body parts) and ...

The most common problem with the circulatory system today is coronary heart disease (also called coronary artery disease). Coronary heart disease is caused by the buildup of cholesterol and other ...

Double circulatory system – A system where blood travels through the heart twice every loop. Gills – The organ that allows fish to breath underwater, it's the equivalent of a mammal’s lungs.

Today, he and his research team stand at the brink of a medical breakthrough — engineering replacement parts for the human circulatory system — and he can just about see the culmination of his ...