Final answer:
An aspirator is a device that uses water pressure to produce a vacuum for the removal of fluids and gas in the visceral cavities.
Step-by-step explanation:
The device that uses water pressure to produce a vacuum for the removal of fluids and gas in the visceral cavities is called an aspirator. An aspirator works by creating a high-speed stream of water, which creates a region of lower pressure. This lower pressure then allows for the removal of fluids and gas from the visceral cavities.