Archive: https://archive.today/pdnRm From the post: >>A team of doctors have identified a ‘second heart’ that has been hiding in the body in plain sight. They've found the aorta, the body’s largest artery, acts like a second heart by stretching and recoiling to help push blood, easing the heart’s workload. For decades the bodypart was thought to just passively carry oxygenated blood from the heart to rest of body. But for the first time, the team from the University of Southern California have found the aorta physicall stretches when the heart beats and then recoils to push blood forward in a process called 'wave-pumping.'