What is the source of warmth in an incubator?

The source of warmth in an incubator is usually a heating element, such as a heating coil or a heat lamp. These heating elements generate heat, which is then circulated within the incubator to maintain a consistent temperature. Some incubators also use water baths or air chambers to provide a regulated source of warmth. The heat source is carefully controlled to ensure that the desired temperature is maintained throughout the incubation period.