What structures make up the urinary system?

The urinary system is primarily made up of four key structures: the kidneys, ureters, urinary bladder, and urethra. The kidneys are responsible for filtering blood to create urine by removing waste and excess substances. Ureters are the tubes that transport urine from the kidneys to the urinary bladder, where urine is stored until it is excreted from the body. Finally, the urethra is the duct through which urine is expelled from the bladder during urination.

The other options listed pertain to different body systems; for instance, the heart, arteries, veins, and capillaries are components of the circulatory system, while the liver, gallbladder, and pancreas are parts of the digestive system, and muscles, tendons, and ligaments relate to the musculoskeletal system. Thus, the correct answer accurately identifies the components that make up the urinary system, which plays a vital role in maintaining the body’s fluid balance and eliminating waste.