What systems work together to control body temperature?

The state of having an even internal temperature is called homeostasis.
A healthy, safe temperature has a very narrow window: between 98°F (37°C) and 100°F (37.8°C).
When your temperature increases, your body activates a system to promote heat loss.
This returns body temperature back to normal.
This process has three steps:
1) Sensors in your central nervous system (CNS) send messages to your hypothalamus,
telling it your internal temperature is increasing.
2) Your hypothalamus, which controls thermoregulation, receives the message.
3) Your hypothalamus activates one of several organs to decrease your temperature.
The same process occurs when your body senses your temperature is falling too low.