How did Montag describe Faber's death?

From the text:

Faber was back there in the steaming lump of tar that had no name or identity now. He had burnt Faber, too. He felt so suddenly shocked by this that he felt Faber was really dead, baked like a roach in that small green capsule shoved and lost in the pocket of a man who was now nothing but a frame skeleton strung with asphalt tendons.

no .i want to know the meaning of the terms "skeletons strung with asphalt tendons "?