The urethra.
The bladder holds the urine 
NO, the urinary bladder is part of the urinary system.
The bladder.
The urinary system includes the kidneys, urethra, bladder.
The structures that are retroperitoneal in a cat's urinary system are the kidneys, the ureters, and the urinary bladder. Retroperitoneal means that these structures can be found behind the peritoneum.
No. It is the opposite. The bladder is part of the urinary system. Since the bladder is an organ it can't be a system. A system is made of several organs.
Organs of the urinary system include the kidneys, ureters, bladder and the urethra.
The bladder is part of the urinary system. The other system that has a bladder is the digestive system. It has the gall bladder.
The Urinary system includes your kidney's urethra,and your bladder:)
The ureters are part of the urinary system. There are two ureters, one coming from each kidney. They attach one on each side at the top/sides of the urinary bladder. They carry urine from the kidneys to the urinary bladder.
They are both in the excretory system...the kidney cleans the liquid waste and the urinary bladder holds it
The urinary system, also known as the renal system, consists of the kidneys, ureters, bladder, and the urethra.