My path prof taught us about inflammation, by rolling up his left sleeve, and pounding
his forearm, until we thought he had flipped. He watched the white area that appeared
first
, turn red and swell. Then pointing to it, he said in oratorical fashion:
Rubor, calor, tumor, dolor, functio laesa. These are the cardinal symptoms of inflammation.....

That was about sixty ;years ago. His demonstration was very effective.

Edit: scatologic typo corrected. Thanks,AS