Skin is an ideal respiratory organ in Frog because it is

Options

A. Highly vascular
B. Kept moist
C. Devoid of hair and scales
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks why the skin is considered an ideal respiratory organ in frogs.

2. **Identify the Characteristics of Frog Skin**:
- Frogs are amphibians, meaning they can live both on land and in water. This dual habitat requires them to have specialized respiratory adaptations.
- Frogs have lungs for respiration on land, but they primarily use their skin for respiration when in water.

3. **Evaluate Each Option**:
- **Option A: Highly Vascular**:
- Frog skin is highly vascularized, meaning it has a rich supply of blood vessels. This allows for efficient gas exchange, as oxygen can easily diffuse into the bloodstream.
- **Option B: Kept Moist**:
- The skin of frogs is kept moist due to the secretion of mucus by glands. A moist surface enhances the diffusion of gases, making respiration more efficient.
- **Option C: Devoid of Hair and Scales**:
- Frog skin lacks hair and scales, which would otherwise obstruct gas exchange. The absence of these structures facilitates better diffusion of oxygen and carbon dioxide.
- **Option D: All of the Above**:
- Since all the previous statements (highly vascular, kept moist, and devoid of hair and scales) are correct, this option is also correct.

4. **Conclusion**: The skin is an ideal respiratory organ in frogs because it is highly vascular, kept moist, and devoid of hair and scales. Therefore, the correct answer is **D: All of the Above**.

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