In general, urine is an excretory product of all living organisms. It is a sterile liquid and a waste product, which is composed of water, salts, urea and other-soluble nitrogen products. In all humans, urine is produced in the kidney and released through the urethra.
The term Urination, also referred to as Micturition mainly refers to the complete process involved in the production and release of urine into the outside of the body from the urinary bladder and through the urethra.
Normal urine consists of water, urea, salts, and pigments. The total amount of urine produced in humans is regulated by the presence of :
- The total amount of water.
- The total amount of dissolved nitrogenous wastes present in the urine
- Certain hormones that help in controlling the movement of water and sodium ions into and out of the nephrons.
Therefore, the total volume of urine produced is in direct proportion with the volume of fluid and other nitrogenous wastes.
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