UNIT OVERVIEW

Your body keeps its inside conditions steady, even when the outside world changes. This process is called homeostasis. It is essential for survival.

Think about stepping from a cool room into hot summer sun. Your body does not heat up like a rock would. Instead, you start sweating and your skin flushes. Your body works to keep your core temperature close to 37°C. How does it "know" what to do? That is what this unit explains.