Final answer:
The statement is false because the peritoneum is not directly associated with muscle fibers exposed to coelomic fluid, as it is a membrane enveloping abdominal organs.
Step-by-step explanation:
The statement that muscle fibers exposed to the fluid in the coelom itself might have a peritoneum is false. The coelom is an internal body cavity, and the peritoneum is a membrane that lines this cavity, specifically within the abdominal area. The visceral peritoneum envelopes abdominal organs and is not associated with muscle fibers directly exposed to coelomic fluid. Instead, these muscle fibers may be associated with connective tissue or other structures that support organ function and placement.