No microbe grows at every temperature or pH — each has a minimum, an optimum, and a maximum. Slide the dial and watch which group the conditions favor. Notice where the human body sits: right in the sweet spot for the microbes that make us sick.
Slide to explore
Each curve is one group's growth rate across the scale. Where the moving line meets the tallest curve, that group grows fastest. The dashed line marks a body reference point.
Temperature & pHslide to find the growth-favoring range