The pleura, peritoneum, and pericardium are examples of :

Options

A. mucous membranes
B. body cavities
C. visceral organs
D. serous membranes

Answer

To answer the question, "The pleura, peritoneum, and pericardium are examples of:", we can follow these steps:

### Step 1: Understand the Definitions
- **Pleura**: This is a membrane that surrounds the lungs and lines the chest cavity.
- **Peritoneum**: This is a membrane that lines the abdominal cavity and covers the abdominal organs.
- **Pericardium**: This is a double-walled sac that contains the heart and the roots of the great vessels.

### Step 2: Analyze the Options
1. **Mucous Membranes**: These membranes are involved in absorption and secretion, typically found lining cavities that open to the outside of the body (like the respiratory and digestive tracts).
2. **Body Cavities**: This term refers to the spaces within the body that house organs, but it does not specifically refer to the membranes themselves.
3. **Visceral Organs**: These are the internal organs, but the term does not apply to the membranes that cover them.
4. **Serous Membranes**: These are specialized membranes that line body cavities and cover the organs within those cavities, producing serous fluid to reduce friction.

### Step 3: Identify the Correct Answer
- Since the pleura, peritoneum, and pericardium all serve to line cavities and cover organs while producing serous fluid, they are classified as **Serous Membranes**.

### Conclusion
Thus, the correct answer to the question is that the pleura, peritoneum, and pericardium are examples of **Serous Membranes**.

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