Scalpel
device · 3000 BC · Ancient world
A surgical knife.
What it is made of
- Replaceable blade — has part. A disposable blade.
- Handle — has part. A blade holder.
Principles and materials it uses
- Steel — is made of. Stainless steel.
- Wedge — uses. The blade.
- Copper — is made of. Egyptian surgical knives were copper.
- Stainless steel — is made of. Stainless steel.
History: what it evolved from and what it influenced
- Knife — evolved from. A surgical knife.