All arthropods and many mollusks have this type of system.
Blood is distinct from interstitial fluid.
Vertebrates These organisms have closed circulatory systems with hearts that have at least two chambers. Name the major vessels that branch off the aorta and where they carry blood. Deoxygenated blood returns to the right atrium of the heart via the superior vena cava from the head and arms, and via the inferior vena cava from the remainder of the body. Pulmonary circuit Purpose is to oxygenate blood by passing it through the lungs. Deoxygenated blood pumped from right ventricle via pulmonary artery to lungs.