Which structures are included in the urinary system?

The urinary system is primarily responsible for the production, storage, and elimination of urine, which helps regulate water and electrolyte balance in the body. The correct structures that comprise the urinary system include the kidneys, ureters, bladder, and urethra.

The kidneys filter blood to remove waste products and excess substances, forming urine. The ureters are tubes that transport urine from each kidney to the bladder, where urine is stored until it is excreted. The urethra then allows for the elimination of urine from the body.

The other options list structures that are associated with different body systems. For instance, the first option references organs related to digestion, while the second focuses on the cardiovascular system and the third relates to the gastrointestinal system. These structures do not play a role in the functions of the urinary system, reinforcing that the correct answer encompasses only those involved in urinary function.