Which statement about the serosa layer is true?

Which statement about the serosa layer is true?

• A. Muscular layer.
• B. Submucosa.
• C. Secretes serous fluid to keep the outside of the canal moist, preventing it from sticking to other organs.
• D. Secretes mucus into the lumen.

Answer: (C)

The serosa is the outermost serous membrane covering many abdominal organs, made of mesothelium with underlying connective tissue, and it secretes a watery serous fluid. This fluid lubricates the surfaces so the organs slide past each other without friction, keeping the outside of the canal moist and preventing sticking to adjacent organs. The muscular layer is deeper (muscularis externa), the submucosa sits beneath the mucosa, and mucus is produced by the mucosa and its glands, not the serosa.

The serosa is the outermost serous membrane covering many abdominal organs, made of mesothelium with underlying connective tissue, and it secretes a watery serous fluid. This fluid lubricates the surfaces so the organs slide past each other without friction, keeping the outside of the canal moist and preventing sticking to adjacent organs. The muscular layer is deeper (muscularis externa), the submucosa sits beneath the mucosa, and mucus is produced by the mucosa and its glands, not the serosa.