TIL about "catgut" strings that are made from animal intestines. These can be used for a wide variety of things from instrument strings to sutures and also tennis racket strings and bow
Catgut - Wikipedia
Nylon or Steel String Guitars: How to Pick the Right Instrument for You.
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Wild - gut strings for musical instruments
Are Violin Strings Really Made of Cat Guts?
Peoria Riverfront Museum - In this interactive for "GUITAR: The Instrument That Rocked The World," hear how catgut, metal, and nylon strings create unique sounds! For most of recorded history, right up
Musical instruments . has aback of satin wood, and sides of turtle shell; the belly andpillar are painted and gilt. It has nineteen catgut strings,six of which are covered with wire.