How come when i hit my head i get a bump, not a dent?
In: Biology
This is essentially the plot of Cells at Work Season 2 Episode 1. Really good quick ELI5 of it here: https://youtu.be/yGkNeihCH7g?t=353
To summarize, you start bleeding without an open wound and it just pools up under your scalp, since your scalp has good blood flow the bump can get pretty noticeable
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