Though less well-known than the body’s blood vessels, the lymphatic system is also vital to health. The network of lymphatic vessels threaded throughout the body removes dead cells and other waste from the bloodstream. It also helps transport the immune cells that fight infections. It was once thought that the lymphatic system didn’t reach into the brain. But over the last dozen years, researchers have found a system of vessels containing cerebrospinal fluid in brain tissue in mice. These vessels appear to
Source: Brain waste-clearance system shown in people for first time | National Institutes of Health (NIH)