Nerves that are not found in frog but are found in humans are

Options

A. glossopharyngeal and hypoglossal
B. glossopharyngeal and spinal accessory
C. spinal acessory and hypoglossal
D. pneumogastric and hypoglossal

Answer

To answer the question regarding the nerves that are found in humans but not in frogs, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Nerves**: We need to look at the options provided and identify which nerves are present in humans but absent in frogs. The options given are:
- Glossopharyngeal
- Hypoglossal
- Spinal accessory
- Pneumogastric

2. **Understand the Nerves**:
- **Glossopharyngeal Nerve (Cranial Nerve IX)**: This nerve is involved in various functions such as taste, swallowing, and the gag reflex. It plays a significant role in the throat area.
- **Hypoglossal Nerve (Cranial Nerve XII)**: This nerve controls the movements of the tongue, which are essential for speech and swallowing.
- **Spinal Accessory Nerve (Cranial Nerve XI)**: This nerve primarily controls the sternocleidomastoid and trapezius muscles, which are involved in head movement and shoulder elevation.
- **Pneumogastric Nerve (Vagus Nerve, Cranial Nerve X)**: This nerve is involved in autonomic control of the heart, lungs, and digestive tract.

3. **Compare with Frog Anatomy**: Frogs have a simpler nervous system compared to humans. They do not possess certain cranial nerves that are more specialized in humans. The glossopharyngeal and hypoglossal nerves are examples of such nerves that are well-developed in humans for complex functions like speech and intricate swallowing.

4. **Conclusion**: Based on the analysis, the nerves that are found in humans but not in frogs are the **Glossopharyngeal and Hypoglossal nerves**.

### Final Answer:
The nerves that are found in humans but not in frogs are the **Glossopharyngeal and Hypoglossal nerves**.

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