15.1Free
Your guide: Miss AimanThinks the human body is the best-designed machine in the syllabus.
A January night in Lahore can drop to 5 °C. A June afternoon can pass 45 °C. That is a 40-degree swing outside, yet the temperature inside your body barely moves from 37 °C.
Nobody reminds your body to sweat or shiver. Something is quietly watching, comparing and correcting all day. Biology calls it homeostasis.
Step 1 / 7