Distinguish between renin and rennin?

Explanation

### Step-by-Step Solution:

1. **Definition**:
- **Renin**: Renin is an enzyme that plays a crucial role in the digestive process.
- **Rennin**: Rennin is a hormone involved in the regulation of blood pressure and fluid balance.

2. **Source of Production**:
- **Renin**: It is produced by the juxtaglomerular apparatus (JGA) cells of the kidney.
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