Ornithine cycle removes two waste products from blood in liver

Options

A. `CO_(2)` and Urea
B. Ammonia and urea
C. Urea and urine
D. `CO_(2)` and ammonia

Answer

### Step-by-Step Solution:

1. **Understanding the Ornithine Cycle**: The Ornithine cycle, also known as the urea cycle, is a series of biochemical reactions that take place in the liver. Its primary function is to convert ammonia, which is toxic, into urea, which is less toxic and can be safely excreted.

2. **Identifying Waste Products**: In the Ornithine cycle, two main waste products are involved:
- **Ammonia (NH3)**: A highly toxic nitrogenous waste produced from protein metabolism.
- **Carbon Dioxide (CO2)**: A byproduct of cellular respiration and metabolism.

3. **Conversion Process**: During the cycle, ammonia combines with carbon dioxide to form urea. This process helps in detoxifying ammonia, which cannot be retained in the body due to its toxicity.

4. **Final Products**: The end product of the Ornithine cycle is urea, which is less toxic than ammonia. Urea is then transported to the kidneys, where it is excreted from the body through urine.

5. **Conclusion**: The Ornithine cycle effectively removes ammonia and carbon dioxide from the blood in the liver, converting them into urea. Therefore, the correct answer to the question is that the Ornithine cycle removes **carbon dioxide and ammonia** from the blood.

### Final Answer:
The Ornithine cycle removes **carbon dioxide and ammonia** from the blood in the liver.

---