State the function of the hepatic portal vein as the route taken to the liver by most of the molecules and ions absorbed from the ileum

Describe the role of the liver in the assimilation of amino acids by converting them to proteins

Name the main blood vessels that carry blood to and from the heart, lungs, liver and kidneys, limited to: aorta, vena cava, pulmonary artery, pulmonary vein, hepatic vein, hepatic artery, hepatic portal vein, renal artery and renal vein