The following simplified diagram refers to the outline plan of the circulation of blood in a mammal. Study the diagram and write the number and the name of the blood vessel mentioned in each case.
(a) Several hours after a meal containing a lot of protein, which vessel will contain the highest concentration of urea?
(b) Which vessel would contain the highest concentration of amino acids and glucose soon after a meal?
1. Pulmonary vein
2. Aorta
3. Hepatic artery
4. Portal vein
5. Renal artery
6. Renal vein
7. Hepatic vein
8. Inferior Vena Cava
9. Pulmonary artery
(a) The hepatic vein has the highest concentration of urea since the liver produces urea and other wastes.
(b) Hepatic portal vein will have the highest concentration of glucose and amino acids which will be absorbed from the food.