Differentiate between the following :
(a) Ureters and urethra
These are 25-30 cm long.
These extend from the kidneys to bladder.
These conduct only urine.
These collect urine from kidneys and pass into urinary bladder.
It is 4 cm long in female and 20 cm long in male.
It is one.
It extends from bladder to outside.
It contains urine and seminal fluid in male.
It collects urine from urinary bladder and pass it outside.