Why skin cannot really consider as an excretory organ?

Explanation

### Step-by-Step Solution:

1. **Understanding Excretion**:
- Excretion is defined as the process of removing metabolic waste from the body, particularly nitrogenous wastes.

2. **Role of Skin**:
- The skin does release a fluid known as sweat. Sweat is primarily composed of water, with small amounts of salts and a very minute quantity of urea, which is a nitrogenous waste.

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