Fill in the blanks with suitable words
Diaphragm forms the _______ of the chest cavity.

Options

A. Back
B. Floor
C. Both (a) and (b)
D. None of the above

Explanation

**Step-by-Step Solution:**

1. **Understand the Function of the Diaphragm**: The diaphragm is a muscle that plays a crucial role in the respiratory system. It separates the chest cavity from the abdominal cavity.

2. **Identify the Role of the Diaphragm**: The diaphragm acts as a barrier between the lungs (located in the chest cavity) and the stomach (located in the abdominal cavity). It helps in the process of breathing by changing the pressure in the chest cavity.

3. **Determine the Correct Word**: Since the diaphragm separates the chest cavity from the abdominal cavity and acts as a floor, the appropriate word to fill in the blank is "floor."

4. **Complete the Sentence**: Thus, the complete sentence would read: "Diaphragm forms the **floor** of the chest cavity."

**Final Answer**: Diaphragm forms the **floor** of the chest cavity.

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