Blood circulation: Blood circulates continuously in the blood vessels of the body. The blood circulating in the body is mainly divided into two parts. 1. Pulmonary circulation: 2.Systemic or general circulation: The systemic circulation begins in the left ventricle of the heart. The left ventricle of the heart contains oxygenated blood which circulates throughout the body through the aorta and every cell and tissue is supplied with oxygenated blood through