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Ansuz07 t1_ja7ug3j wrote

In biology, an organ is defined as a collection of tissues that structurally form a functional unit specialized to perform a particular function.

Skin meets this definition quite nicely. It is a collection of tissues that form a very discernable structure and fulfill the purpose of providing a protective barrier for our internal organs.

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DTux5249 t1_ja8q7rb wrote

An organ is any collection of cells specialised to do a specific job (or jobs). Your skin, bones, stomach, basically any seperate living part of your body is considered an organ.

The only difference about skin is that it's external, which honestly doesn't make it terribly special. Something had to be on the outside of you.

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TheFek t1_jaa4khy wrote

Made of multiple different kinds of tissue: check (connective and epithelial)

Has a specific function: check (protects, cools, encases, just to name a few)

That makes an organ an organ

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