Dissection : the action of dissecting a body or plant to study its internal parts. Cut : make an opening, incision, or wound in (something) with a sharp-edged tool or object. Crumble : break or fall apart into small fragments, especially as part of a process of deterioration. Scrap : a small piece or amount of something, especially one that is left over after the greater part has been used. Fragment : a small part broken off or separated from something.