The brain stem which is composed of the Pons, The Medulla, and the Midbrain serve a very vital function... They control the functions that keep you alive; Heart Rate, Respiratory Rate, Breathing input and output, Blood pressure, as well a vasomotor functions. So taking this into account, an injury to the brain stem is extremely bad, as that can and will most definitely be very lethal.
Physical activity and Protein intake.
The greatest challenge to forensic science isn't any one drug, but a combination of drugs and chemicals and their complex reactions. The longer the drug remains in the body, the more it is metabolized into another substance.
Burning nonrenewable resources
