Name the amino acids involved in urea cycle.

Explanation

### Step-by-Step Solution:

1. **Understanding the Urea Cycle**: The urea cycle is a series of biochemical reactions that convert ammonia, which is toxic to the body, into urea, which can be safely excreted. This process primarily occurs in the liver.

2. **Identifying Amino Acids Involved**: The amino acids involved in the urea cycle are crucial for the conversion of ammonia to urea. The main amino acids that participate in this cycle are:
- **Ornithine**: A non-protein amino acid that plays a key role in the urea cycle.
- **Citrulline**: Another non-protein amino acid that is formed in the urea cycle and is involved in the conversion process.
- **Aspartic Acid**: A protein amino acid that helps in transporting ammonia to the liver for conversion.
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