Angiology is the medical specialty which studies the diseases of the circulatory system and of the lymphatic system, i.e., arteries, veins and lymphatic vessels, and its diseases. Angiology is concerned with the body's complex system of blood vessels, particularly the arteries and veins. Angiology is the study of blood vascular system or circulatory system. William Harvey is the father of angiology. Angiology is the medical specialty which studies the diseases of the circulatory system and of the lymphatic system, i.e., arteries, veins and lymphatic vessels.Angiology is the study of blood vascular system or circulatory system.Textbook of Angiology aims to provide the reader with a fully integrated view of medical and surgical aspects of both vascular and cardiovascular disease. As a medical-surgical speciality, the Germans Trias Angiology and Vascular Surgery Service treats different pathologies associated with blood vessel diseases. White blood cells are sometimes called phagocytes because they surround, engulf and destroy foreign substances in blood. It is non-invasive which means that there are no injections or radiation involved. Angiography in the broadest meaning is looking at blood vessels, both arteries and veins.