Careful Autopsy

When this spell is cast on a corpse, you must touch both the material component you are using, and the body. You may swap the material and one system of your choice. The system can be the Skeletal, nervous, vascular, etc. The fresh tissue system will swap places with the material, and the material will be places in the same shape and form the System was. The new material copy does not copy to perfection, only to a very aproximate shape of what the system looked like, almost like if it had been cast in a mold.