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 ...

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 ...

You already know that keeping your heart in tip-top shape is a key part of maintaining your cardiovascular health—but your cardiovascular system goes beyond that beating organ in your chest. After all ...

POTS (Postural Orthostatic Tachycardia Syndrome) represents a mechanical failure of blood flow, distinct from standard heart ...