Identify the part that opens into a tube-like structure called trachea.

Options

A. Pharynx
B. Bronchioles
C. Larynx
D. Vocal cords

Explanation

To identify the part that opens into a tube-like structure called the trachea, we can follow these steps:

1. **Understand the Structure of the Trachea**: The trachea is a hollow tube-like structure that serves as the windpipe, allowing air to pass from the upper respiratory tract to the lungs.

2. **Identify the Options**: The options provided are:
- A) Pharynx
- B) Bronchoids
- C) Larynx
- D) Vocal cord

3. **Analyze Each Option**:
- **Pharynx**: This is a part of the throat that connects the mouth and nasal passages to the larynx and esophagus but does not directly open into the trachea.
- **Bronchoids**: This term is not commonly used in human anatomy; it may refer to bronchioles, which are smaller branches of the bronchi but do not open into the trachea.
- **Larynx**: Known as the voice box, the larynx is located above the trachea and opens into it. It is responsible for producing sound and protecting the airway during swallowing.
- **Vocal cord**: These are located within the larynx and are involved in sound production but do not themselves open into the trachea.

4. **Conclusion**: The part that opens into the trachea is the **larynx**. Therefore, the correct answer is **C) Larynx**.