A wildlife biologist measured how the internal body temperature of a badger (a mammal) and a common toad (an amphibian) varied with different external environmental temperatures. The results are shown in the table below.
| External temperature / °C | Badger internal temperature / °C | Toad internal temperature / °C |
|---|---|---|
| 5 | 37.5 | 5.1 |
| 12 | 37.8 | 12.0 |
| 18 | 38.0 | 18.2 |
| 25 | 38.1 | 25.0 |
| 32 | 38.3 | 31.8 |
Explain why it is important that the core body temperature of the badger is maintained constant at around 38°C.
