Differentiate between Collagen fibres and elastin fibres

Explanation

### Step-by-Step Solution:

1. **Definition of Collagen Fibers**:
- Collagen fibers are a type of fibrous protein found in connective tissue. They are secreted in the form of tropocollagen molecules by cells known as fibroblasts. Once secreted, these molecules assemble extracellularly to form striated collagen fibrils.

2. **Definition of Elastic Fibers**:
- Elastic fibers are another type of fibrous protein found in connective tissue. They are primarily composed of the protein elastin, which allows them to stretch and return to their original shape.

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