Urinary System Facts for Kids

A Picture of the Urinary System
  • System: Urinary
  • System Name: The Urinary System
  • Purpose: Elimate waste from the human body
  • Location: Between the middle and lower section
  • Organs: Bladder, kidneys, ureters and the urethra
  • TA ID: A08.0.00.0000
  • FMA ID: 7159

24 Urinary System Facts for Kids

  1. The urinary system is a biological system that helps remove waste from the human body.
  2. The urinary system is also referred to as the renal system or the urinary tract.
  3. The urinary system not only eliminates waste, it helps regulate the pH of blood, blood pressure, blood volume and controls the levels of electrolytes and metabolites in the body.
  4. The urinary system is influenced by the circulatory system, endocrine system and nervous system.
  5. The urinary system consists of six organs.
  6. The six organs that make up the urinary system are two kidneys, two ureters, the bladder and the urethra.
  7. The two kidneys filter blood by removing the waste and other undesired substances and materials.
  8. The two ureters transfer waste (urine) from the two kidneys to the bladder, each kidney is connected to one ureter.
  9. The bladder stores urine from the kidneys until it’s disposed.
  10. The urethra is a tube connected to the bladder that is used to remove urine (peeing) when the bladder gets full.
  11. The average male adult human has a urethra that is between 7.1 and 7.9 inches long.
  12. The average female adult human has a urethra that is 1.5 inches long.
  13. The average adult human produces around 1.4 liters of urine each day.
  14. The average pH of urine in an adult human is 6.2 but can range between 5.5 and 7 pH.
  15. The composition of urine is between 91 and 96% with the rest making up inorganic salts and organic compounds.
  16. Urine can vary in color, but clear to pale yellow is considered normal and healthy.
  17. Urine with a very dark yellow color is an indication that you might be dehydrated.
  18. Urine can vary in smell; it can produce no odor at all or release a fish-like odor.
  19. The smell and color of urine can also be influenced foods, like asparagus.
  20. A urinary tract infection (UTI) is a condition where somewhere in the urinary tract there is an infection.
  21. A urinary tract infection in the lower urinary tract is called a bladder infection (cystitis).
  22. A urinary tract infection in the upper urinary tract is called a kidney infection (pyelonephritis).
  23. Women are more likely than men to get a urinary tract infection.
  24. According to a study by the U.S. National Institute of Health, around 150 million people every year are affected by a urinary tract infection across the globe.

Additional Resources on the Urinary System