Which term refers to the treatment of tissues to remove excess fluid and preserve them?

The term that refers to the treatment of tissues to remove excess fluid and preserve them is embalming. Embalming is a process that involves the injection of a chemical solution into the body to replace bodily fluids and inhibit decomposition. This procedure not only helps in preserving the physical appearance of the deceased but also prevents the growth of bacteria and other microorganisms, ensuring a more hygienic environment.

In contrast, disinfection typically involves the removal or killing of pathogens from surfaces or substances, rather than preserving bodily tissues. Preservation, while related to maintaining the condition of tissues, is a broader term that can encompass various methods, including but not limited to embalming. Restoration refers to correcting or repairing physical features or damages, often in the context of preparing the deceased for viewing or a service, but it does not inherently involve the removal of fluids or the chemical treatment that embalming entails.