Which one is vestigeal organ of man

Options

A. Epiglottis
B. Muscles of ear pinna
C. Fossa ovalis
D. Ileum

Explanation

**Step-by-Step Solution:**

1. **Understanding Vestigial Organs**: Vestigial organs are remnants of structures that were once functional in our ancestors but have lost their original function through the course of evolution.

2. **Identifying the Options**: The options given are:
- Epiglottis
- Muscles of Ear Pina
- Fossa Ovalis
- Ilium

3. **Analyzing Each Option**:
- **Epiglottis**: This is a flap-like structure that prevents food and drink from entering the windpipe. It plays a crucial role in swallowing and is not considered vestigial.
- **Muscles of Ear Pina**: These muscles allow movement of the ear, which was useful for our ancestors to detect sound direction. In modern humans, these muscles are largely non-functional, making them a vestigial organ.
- **Fossa Ovalis**: This is a structure in the heart that prevents backflow of blood. It has an important function and is not vestigial.
- **Ilium**: This is the last part of the small intestine, responsible for nutrient absorption. It is essential for digestion and is not vestigial.

4. **Conclusion**: The only option that fits the definition of a vestigial organ is the **Muscles of Ear Pina**.

**Final Answer**: The vestigial organ of man is the **Muscles of Ear Pina**.

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