Final answer:
The wet sterilization system for unwrapped items is immediate-use steam sterilization, which uses moist-heat to effectively kill microbial cells, including endospores, without damaging items.
Step-by-step explanation:
The wet sterilization system for unwrapped items is immediate-use steam sterilization. This method utilizes moist-heat sterilization, which is typically more effective than dry-heat methods because it penetrates microbial cells better. Autoclaves, which are used for this kind of sterilization, can raise temperatures above the boiling point of water to effectively sterilize items such as surgical equipment, killing viruses, vegetative cells, and especially endospores without damaging the items. Unlike dry heat sterilizers, ethylene oxide (EO) gas sterilizers, or ozone sterilizers, immediate-use steam sterilization is used to quickly prepare items that are needed immediately and does not require packaging or long waiting periods post-sterilization.