2.66 understand the general structure of the circulation system to include the blood vessels to and from the heart, the lungs, the liver and the kidneys2.66 understand the general structure of the circulation system to include the blood vessels to and from the heart, the lungs, the liver and the kidneys

 The pulmonary artery brings the blood away from the heart and the pulmonary vein brings it back.

The blood vessel leading towards the liver is the hepatic 
artery and the blood vessel leading towards the heart

is the hepatic vein.

The hepatic portal vein connects the liver to the gut 
(digestive system)

The renal artery leads towards the kidneys and the renal vein leads back to the heart.