There are three types of circulation found in the human body, systemic circulation, pulmonary, and coronary circulation. Systemic circulation is otherwise known as greater circulation. Blood pumped from the left ventricle passes through a series of blood vessels, arterial system and reaches the rest of the body. The exchange of various substances between the blood and the tissues occurs at the capillaries. After an exchange of materials, blood enters the venous system and returns to the right atrium of the heart.
Pulmonary circulation is otherwise called lesser circulation. Blood is pumped from the right ventricle to the lungs through the pulmonary artery. Exchange of gases occurs between blood and alveoli of the lungs at pulmonary capillaries. Oxygenated blood returns to the left atrium through the pulmonary veins.
Coronary circulation is the circulation in which the blood vessels supply the heart muscle. The coronary supplies mainly oxygenated blood to the heart muscles, and the cardiac veins drain away from the blood once it has been deoxygenated.