Which of the following membranes is commonly known as the skin?

• A. Serous membrane
• B. Cutaneous membrane
• C. Mucous membrane
• D. Synovial membrane

Answer: (B)

Verified step by step guidance

1. Begin by understanding the different types of membranes in the human body. Membranes are thin layers of tissue that cover surfaces, line cavities, and divide spaces or organs.
2. Identify the function and location of each type of membrane mentioned in the problem: serous, cutaneous, mucous, and synovial.
3. Serous membranes line and enclose several body cavities, where they secrete a lubricating fluid to reduce friction from muscle movements.
4. Mucous membranes line body cavities and canals that open to the outside, such as the respiratory and digestive tracts, and they secrete mucus.
5. Synovial membranes line the cavities of joints, producing synovial fluid for lubrication. The cutaneous membrane, commonly known as the skin, covers the body surface and provides protection.