Urinary system summary seventh grade

Section summary
Read the following section summary.
• The urinary system removes liquid waste as urine. The filtering structures in the kidney are called nephrons.
• Most of the water in the blood is returned to the bloodstream. Urine passes through the ureter, into the bladder, and out of the body through the urethra.
• Disorders of the urinary system include infections, kidney stones, andkidney disease.