2: Ecorche
Gaspar Beccerra (referencing Michelangelo)
Illustration commonly known as Muscle-manikin holding his skin (or similar), 1586
Excerpted engraved illustration from "La anatomia del corpo umano" ("The anatomy of the human body")
Mentioned that I'll be putting the anatomy studies to use by doing a bust sculpture that shows through to some of the underlying bones and muscles of the head.
Fun fact: there is actually a specific name for showing a figure with the skin peeled off. It's called écorché ('AY-core-SHAY'), a French term translating as 'flayed': écorché drawings and such became really popular as a method of study during the Renaissance, and are still commonly used today to get a better understanding of how the underlying anatomy of a body influences the surface appearance.