Section B: Give a very short answer to the question given below.
 
23. Write one specific function each of the following organs in relation with excretion in human beings:

i. Renal Artery
ii. Urethra
iii. Glomerulus
iv. Tubular part of nephron
 
i. Renal Artery -
ii. Urethra -
iii. Glomerulus -
iv. Tubular part of nephron -