Which of the following lists contains the organs of the urinary system?

• A. Liver, Stomach, Intestines, Esophagus
• B. Kidneys, Ureters, Bladder, Urethra
• C. Heart, Lungs, Brain, Skin
• D. Lungs, Trachea, Bronchi, Diaphragm

Answer: (B)

The main idea is identifying which organs belong to the urinary system, which is responsible for filtering waste and maintaining fluid balance. The list that includes kidneys, ureters, bladder, and urethra matches these roles: the kidneys filter blood to make urine, urine travels down the ureters to the bladder for storage, and the urethra provides the route for urine to leave the body. The other options contain organs from the digestive system or other body systems (digestive organs like liver, stomach, intestines, and esophagus; respiratory and other organs like heart, lungs, brain, skin; and lungs, trachea, bronchi, diaphragm), which are not part of the urinary system.