Concept:The urinary system removes waste from the body through the kidneys, ureters, bladder, and urethra.
Explanation:The diagram shows two bean-shaped kidneys located near the middle of the back.
From each kidney, a tube called the ureter carries urine downward.
The ureters join a hollow sac, the bladder, which stores urine.
Urine then passes out through the urethra, a small tube from the bladder.
This set of organs belongs to the urinary system.
It is not the circulatory system because there is no heart or network of blood vessels.
It is not the reproductive system because no ovaries or testes are shown.
It is not the nervous system because the brain, spinal cord, and nerves are not present.
The structures in the diagram match the organs concerned with the formation and removal of urine.
Answer:C. urinary system
