In which of these is a type of cord called "catgut" used?

Was/is used in stringed musical instruments too.

RedSeaDiver, yes!! I heard it was used in violin strings.

To me it's fishing line in old money!! In the last 20+years catgut has been replaced in modern medicine by asorbable polymers..

Rick-N-Bacher, Mine is a foot long and still got the staple marks. Same operation nowadays and only two small 'pin holes' to heal.

Used to make snowshoes as well!

what are the benefits of using cat gut to close wounds, compared to synthetic fiber? they closed me up with staples. I had a 14 inch zipper on my belly. and they used a staple remover to take them out in 2 minutes

I've always heard that tennis rackets were made out of catgut