Wikia

Flesh describes the essence of certain organisms, mostly animals.

Flesh in the Wizarding World

Some creatures, like acromantulas, ate human flesh.
In 1995, the flesh of the Death Eater Wormtail, was one of the three ingredients that was added to the potion that helped in the Return of the Dark Lord.
In 1997, Draco Malfoy lost a lot of blood when Harry Potter cut through his flesh with Sectumsempra.
During the Battle of the Seven Potters, George Weasley lost an ear when Severus Snape cut through his flesh with Sectumsempra.
In 1997, Ron Weasley was seriously injured when a chunk of flesh from his upper arm was splinched.

Chapter 32 in Harry Potter and the Goblet of Fire is titled "Flesh, Blood and Bone".