Final answer:
An incubator is used to maintain body temperature conditions, and a refrigerator keeps items at low temperatures to prevent biological degradation.
Step-by-step explanation:
Among the listed pieces of laboratory equipment, the incubator and the refrigerator are used to regulate body temperature. An incubator is used to maintain a constant temperature to simulate body temperature conditions, which is particularly important for the growth of cell cultures. On the other hand, a refrigerator is used to store biological samples and other items at low temperatures to prevent spoilage and degradation.