What is the main excretory product of humans ?

Answer

**Step-by-Step Solution:**

1. **Understanding the Excretory System**:
- The human excretory system is well-developed and primarily consists of a pair of kidneys, along with other components such as the urinary bladder, ureters, and urethra.

2. **Identifying the Type of Waste**:
- Humans excrete nitrogenous waste. This type of waste is produced as a result of protein metabolism and is a byproduct of the breakdown of amino acids.

3. **Production of Nitrogenous Waste**:
- In humans, the liver plays a crucial role in the production of nitrogenous waste through a process known as the ornithine cycle.

4. **Main Excretory Product**:
- The primary nitrogenous waste product in humans is urea. Urea is less toxic compared to other nitrogenous wastes and is more soluble in water.

5. **Excretion Process**:
- Urea is excreted from the body in the form of urine, which is formed through the filtration of blood in the kidneys.

6. **Conclusion**:
- Therefore, the main excretory product of humans is urea.

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