Hairlike processes that project from epithelial cells are called:

• A. Flagella
• B. Microvilli
• C. Desmosomes
• D. Cilia

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the structure and function of epithelial cells. Epithelial cells line surfaces and cavities in the body, and they often have specialized structures to perform specific functions.
2. Step 2: Learn about the hairlike processes that project from epithelial cells. These structures are typically involved in movement or increasing surface area for absorption.
3. Step 3: Differentiate between the options provided: Flagella, Microvilli, Desmosomes, and Cilia. Flagella are long, whip-like structures used for cell movement (e.g., sperm cells). Microvilli are small projections that increase surface area for absorption, commonly found in the intestines. Desmosomes are cell junctions that provide structural support by anchoring cells together.
4. Step 4: Focus on Cilia. Cilia are hairlike projections that extend from the surface of epithelial cells. They are involved in moving substances across the cell surface, such as mucus in the respiratory tract or eggs in the fallopian tubes.
5. Step 5: Conclude that the correct answer is Cilia, as they match the description of hairlike processes projecting from epithelial cells.