Name a calcified cartilage. Why it is present in frog but not in man?

Explanation

### Step-by-Step Text Solution

1. **Identify the Calcified Cartilage**: The calcified cartilage present in frogs is called **Suprastapula**.

2. **Understanding Calcified Cartilage**: Calcified cartilage is a type of cartilage that contains calcium phosphate, making it hard and strong. This property provides protection to the animal's internal organs.

3. **Function in Frogs**: In frogs, the suprastapula serves a crucial role because frogs do not have ribs. The suprastapula acts as a substitute for ribs, providing structural support and protection for vital organs such as the heart and lungs.

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