Urinary System

the _______ is a stretchy organ that stores urine

• ureter

• bladder

• kidney

liquid wastes move from the kidneys to the bladder through the _______

• ureters

• urethra

• collecting tubules

your bladder has ___ layers of muscles

• 5

• 3

• 4

your bladder feels comfortable storing ______ cups of urine

• one

• four

• three

___________ keeps the urine from going back toward the kidneys while the bladder contracts

• valves

• stones

• knots