What are the organs in the circulation systems?

The main organs in the circulatory system include the heart, blood vessels, and blood. The heart pumps blood throughout the body, while blood vessels, including arteries, veins, and capillaries, transport blood to and from various tissues. Additionally, organs such as the lungs (in the pulmonary circulation) and the liver (in the hepatic circulation) play crucial roles in gas exchange and blood filtration, respectively.