Your answer is incorrect.  Toxicants that enter the vascular system of the gastrointestinal tract are carried directly to the liver by the portal system. Thus, toxicants are immediately subject to biotransformation or excretion by the liver. This is often referred to as the "first pass effect." If the toxicant is biotransformed immediately by the liver, then less of the parent toxicant will be available for distribution to other parts of the body.