Study the diagram given below and answer the questions that follows.

(a) Identify the structure.

(b) Write one difference in the composition of blood flowing through the blood vessels A or B.

(c) Which part of kidney contains freshly collected urine?

(a) Human excretory system.

(b) Blood flowing through blood vessel 'A' is impure and has more nitrogenous waste, while the blood flowing through blood vessel 'B' is filtered blood and has less nitrogenous waste.

(c) The renal pelvis contains the freshly collected urine.