The Urinary System

one of a pair of organs that filters blood

a microscopic filter that removes waste from blood

a harmful substance formed when cells use protein for energy

an organ that stores urine

a tube that carries urine to urinary bladder

a tube that carries urine out of the body

What substance tells the kidneys to take water from the nephrons?

When salts and other wastes collect in the kidneys, which of the following can form?

Which of the following can enter the bladder through the urethra and cause infections?

The yellow fluid that remains after the nephrons have cleaned the blood is called