Read the following four statements (A-D) with respect to epithelial tissue.
(A) It has a free surface, which faces either a body fluid or the outside environment and thus provides a covering or a lining for some parts of the body.
(B) The cubiodal epithelium of proximal convoluted tubules of nephron in the kidney lacks microvilli.
(C) The function of ciliated epithelium is to move particles or mucus in all directions over the epithelium
(D) Compound epithelioum cover the dry surface of the skin, moist surface of buccal cavity, pharynx, inner lining of ducts of salivary glands and of pancreatic ducts.
How many of the above statements are right?

Options

A. One
B. Two
C. Three
D. Four

Answer

To determine how many of the statements (A-D) regarding epithelial tissue are correct, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement A**: "It has a free surface, which faces either a body fluid or the outside environment and thus provides a covering or a lining for some parts of the body."
- **Analysis**: This statement is true. Epithelial tissue indeed has a free surface that can face body fluids or the external environment, serving as a protective covering or lining for various body parts.

2. **Statement B**: "The cuboidal epithelium of proximal convoluted tubules of nephron in the kidney lacks microvilli."
- **Analysis**: This statement is false. The cuboidal epithelium in the proximal convoluted tubules (PCT) of the nephron does have microvilli. These microvilli increase the surface area for reabsorption, which is a crucial function of the PCT.

3. **Statement C**: "The function of ciliated epithelium is to move particles or mucus in all directions over the epithelium."
- **Analysis**: This statement is also false. The primary function of ciliated epithelium is to move particles or mucus in a specific direction, not in all directions. Cilia beat in a coordinated manner to push mucus and trapped particles toward the throat for expulsion.

4. **Statement D**: "Compound epithelium covers the dry surface of the skin, moist surface of buccal cavity, pharynx, inner lining of ducts of salivary glands and of pancreatic ducts."
- **Analysis**: This statement is true. Compound epithelium does cover these areas, providing protection and serving various functions depending on the location.

### Conclusion:
- **Correct Statements**: A and D are correct.
- **Incorrect Statements**: B and C are incorrect.

Thus, out of the four statements, **2 statements (A and D) are correct**.

### Final Answer:
**2 statements are correct.**

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