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?

The diagram below represents the simplified pathway of the circulation of blood. Study the same and answer the question that follow:
(a) Name the blood vessels labelled 1 and 2.
(b) State function of blood vessels labelled 5 and 8
(c) What is the importance of the blood vessel labelled 6?
(d) Which blood vessel will contain a high amount of glucose and amino acids after a meal?
(e) Draw a diagram of the different blood cells as seen in a smear of human blood.

Name the blood vessel that has the highest concentration of urea after a protein-rich meal.