Facts about the bladder

The bladder is a hollow, muscular, balloon-shaped organ that sits in your pelvis. Its function is to collect and store urine until it can be excreted via urination. Take a look at our top facts on the bladder below;



  • The kidneys generate urine by continually filtering your blood, in one day they will filter approximately 200 litres of blood to remove excess water and waste.

  • Urine is transported from the kidneys to the bladder via the ureters.

  • Three sets of muscles work together to hold urine in the bladder, these include the muscle of the urethra, the internal sphincter (at the bladder neck) and the pelvic floor muscles.

  • The average bladder capacity is between 400ml and 600ml of urine.

  • When your bladder is half full, it sends a message to your brain to make you aware that you will need to pass urine soon.

  • On average, the bladder will need to empty 4-6 times every 24-hours.

  • The tube that excretes urine from the bladder is called the urethra. Women have a shorter urethra than men. This means women are more prone to bladder infections as bacteria have a shorter distance to travel to reach and infect a women’s bladder.

  • The average person passes approximately 1.5 litres to 2 litres of urine in a 24-hour period.

  • Ring like muscles called sphincters keep the bladder closed to store urine.

  • For those over the age of 65, it is normal to wake up once or twice a night to pass urine.

  • Healthy urine should appear light yellow or the colour of straw. Dark-coloured urine indicates you are not drinking enough water, and could indicate a health problem.

This article is intended to inform and give insight but not treat, diagnose or replace the advice of a doctor. Always seek medical advice with any questions regarding a medical condition.

18 views