The cardiovascular system consists of the heart, blood vessels, and blood. Its primary function is to transport nutrients and oxygen-rich blood to all parts of the body and to carry deoxygenated blood ...

Coronary arteries are a vital part of the human heart, providing it with oxygen-rich blood so that it can work. By comparing the hearts of mammals, birds, reptiles, fish and frogs, a ...

Researchers play ultra-brief tones to stimulate the brain during deep sleep. This stimulation improves cardiac output and relaxation of the left ventricle. Such technology to improve cardiovascular ...