Urine is primarily composed of water, with various dissolved substances.
Composition of Urine
Human urine is a complex mixture, but its main components are:
- Water (95%): The largest part of urine is water. This acts as the solvent for other substances.
- Urea (2%): This is a waste product formed when the body breaks down proteins.
- Creatinine (0.1%): A breakdown product of creatine phosphate in muscles.
- Uric Acid (0.03%): A waste product from the breakdown of purines.
- Other Ions and Molecules: Urine also contains various ions and molecules including chloride, sodium, potassium, sulphate, ammonium, and phosphate. These are found in smaller amounts.
Trace Amounts of Protein
It's important to note that proteins are typically found only in trace amounts in urine, much lower than their levels in blood plasma.
| Component | Percentage (%) |
|---|---|
| Water | 95 |
| Urea | 2 |
| Creatinine | 0.1 |
| Uric Acid | 0.03 |
| Other Ions & Molecules | Remainder |
In essence, urine is a fluid primarily composed of water that contains various waste products the body needs to eliminate. The specific amounts of these components can vary depending on diet, hydration, and overall health.
