Mrs. X was getting out of her car, when she slammed the car door
on her knee, hurting it quite badly, even though there was no
broken skin or bleeding. The knee became very swollen and painful
within the first couple of hours of the injury, making it difficult
to walk, so Mrs. X went to an emergency room to check her knee.
Explain what happened here at the cellular level (use
the inflammatory reaction cascade to answer step by...