Écorché
An écorché (French pronunciation: [ekɔʁʃe] ) is a figure drawn, painted, or sculpted showing the muscles of the body without skin, normally as a figure study for another work or as an exercise for a student artist. The architect and Renaissance man Leon Battista Alberti recommended that when painters intend to depict a nude, they should first arrange the muscles and bones, then depict the overlying skin.