Angiology is that branch of systematic anatomy, which deals with the organs of circulation. The circulatory apparatus comprises of heart and vessels. The heart is a central hollow muscular organ, which functions as a force and suction pump, situated in the middle mediastinal space of the thorax. It is enclosed in a fibro-serous sac-the pericardium.
The vessels are named blood and lymph vessels according to the nature of fluid they carry. This branch of anatomy is divided into two sections, the blood vascular and lymphatic system.