What is chondrin? Where is it present?

Explanation

**Step-by-Step Solution:**

1. **Definition of Chondrin**: Chondrin is a type of matrix that serves as a supportive structure in connective tissue, specifically in cartilage.

2. **Composition of Chondrin**: It is a bluish, gelatin-like substance primarily composed of proteoglycans, which include chondroitin 6-sulfate and hyaluronic acid. These components contribute to its gel-like consistency and functional properties.

3. **Function of Chondrin**: The primary function of chondrin is to supply nutrients to the cartilage, particularly in joint areas where blood vessels are absent. This is crucial for maintaining the health and functionality of cartilage.

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