Define oxysomes.

Explanation

### Step-by-Step Text Solution

1. **Definition of Oxysomes**: Oxysomes are spherical, knob-like structures found on the inner surface of the inner membrane of mitochondria.

2. **Context of Mitochondria**: Mitochondria are double membrane organelles that are often described as cylindrical or sausage-shaped. They play a crucial role in energy production within the cell.

3. **Structure of Mitochondria**: Mitochondria consist of two membranes:
- **Outer Membrane**: The outermost layer that encloses the organelle.
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