Nasal cavity and oral cavity are separated by

Options

A. nasal septum
B. diaphragm
C. hard palate
D. mediastinum

Answer

To answer the question "Nasal cavity and oral cavity are separated by," we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Structures**:
- The nasal cavity is the space behind the nose that is involved in breathing and filtering air.
- The oral cavity is the space within the mouth that is involved in digestion and speech.

2. **Evaluating the Options**:
- **Option A: Nasal Septum**: This is a structure made of cartilage and bone that divides the nasal cavity into left and right halves. It does not separate the nasal cavity from the oral cavity.
- **Option B: Diaphragm**: This is a muscle located below the lungs that plays a crucial role in respiration. It does not separate the nasal and oral cavities.
- **Option C: Hard Palate**: This is the bony structure that forms the roof of the mouth. It separates the oral cavity from the nasal cavity.
- **Option D: Mediastinum**: This is the area in the thoracic cavity that separates the left and right lungs. It does not relate to the separation of the nasal and oral cavities.

3. **Identifying the Correct Answer**:
- After evaluating all the options, the correct answer is **C: Hard Palate**. The hard palate separates the nasal cavity from the oral cavity.

### Final Answer:
The nasal cavity and oral cavity are separated by the **hard palate**.

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