“Great things are done by a series of small things brought together. ” – Vincent Van Gogh
The blood circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of humans or other vertebrates. It includes the cardiovascular system, or vascular system, which consists of the heart and blood vessels. The circulatory system has two divisions, a systemic circulation or circuit, and a pulmonary circulation or circuit.