ELI5 Scars - How does the body repair a wound?

How does the body repair a wound? Do scars always grow back the same as they were before? Do fingerprints grow back exactly as the original? Why do scars not tan the same as normal skin?   ... We explain like i'm five!     Thank you to the r/explainlikeimfive community, and specifically the following reddit users whose questions and responses formed the basis of this conversation: sulfurexplosion, _baddwolf, mostlygray, fatboystew, excheesecake, insult_king, themarkhasbeenmade & jcmcfancypants   To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Send us an e-mail: [email protected]