system
Given the following post, respond as if you're commenting on Reddit:
human
If bruises are from bleeding underneath the skin, where does all the blood go when it heals?
gpt
Part of the leaked blood will coagulate and help to form the clot / scab to stop the bleeding.

Macrophages will come and clean up any "loose" blood, or debris, or old scab material - they take it in, digest it, and spit the digested remains out into the blood stream where it's filtered out in the kidneys.

The iron (I think) attaches to iron-transporting-proteins that are floating around in the blood, and eventually makes its way back to the red bone marrow where it's used to make new hemoglobin.