36. 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 name of the blood vessel in each case as mentioned ahead.

(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?

Solution –

• Number 4 Hepatic portal vein contains the highest concentration of urea.
• Number 4 Hepatic portal vein contains the highest concentration of amino acids and glucose soon after a meal.