Which of the following organs is NOT part of the urinary system?

The liver is not part of the urinary system, making it the correct choice in this scenario. The urinary system primarily consists of organs that produce, transport, store, and eliminate urine, which includes the kidneys, bladder, and ureters.

The kidneys filter blood to form urine, while the ureters transport urine from the kidneys to the bladder, where it is stored until excretion. The liver, on the other hand, is primarily involved in metabolic processes, including detoxification, protein synthesis, and the production of biochemicals necessary for digestion. It plays a vital role in various bodily functions, but it is not a component of the urinary system.