The waste matters (urea) are transported by

Options

A. Blood
B. Lymph
C. RBC
D. None of the above

Answer

### Step-by-Step Solution:

1. **Understanding Urea Formation**: Urea is synthesized in the liver from ammonia and carbon dioxide through a series of biochemical reactions. This process is known as the urea cycle.

2. **Release into Bloodstream**: After urea is formed in the liver, it is released into the bloodstream. This is the primary means by which urea is transported from the liver to other parts of the body.

3. **Transport Mechanism**: The urea travels through the blood vessels. Blood serves as the transport medium for various substances, including waste products like urea.

4. **Filtration in the Kidneys**: The blood, now containing urea, is transported to the kidneys. In the kidneys, blood undergoes filtration, where waste products, including urea, are separated from the blood.

5. **Excretion**: After filtration, urea is excreted from the body in urine. This process ensures that waste products are eliminated from the body efficiently.

6. **Conclusion**: Therefore, the waste matter such as urea is transported by the blood.

### Final Answer:
The waste matters (urea) are transported by the **blood**.

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