List two differences between white fibres and yellow fibres.

Explanation

### Step-by-Step Text Solution

1. **Composition**:
- **White Fibers**: White fibers are primarily composed of collagen, a strong and durable protein that provides strength and rigidity to the tissues.
- **Yellow Fibers**: Yellow fibers are made of elastin, a protein that allows for elasticity and flexibility in the tissues.

2. **Strength and Rigidity**:
- **White Fibers**: These fibers are strong and provide structural support, making them inextensible. They are arranged in bundles, which contributes to their rigidity and strength.
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