system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do bruises heal themselves?

When you get a bruise, the black and blue spot you observe is a result of burst blood vessels beneath the skin. Where does the blood go as the bruise heals? What happens to it?
gpt
To know why it heals you have to know that a bruise is just a bunch of broken blood vessels in the area of impact that are leaking blood. 

Our body can fix this because it's a giant pump and filtration system. As the broken bits heal our body is continuously pumping blood/fluids through and around the healing area which break the bruise (leaked blood) down and put it into the filtration system to be cleaned.