And we'll discuss these chemicals in detail when we'll discuss these in the next several lectures. Now the final type of pathway is our endocrine signaling pathway. This is the pathway that is actually used by the endocrine system. In this pathway the cell creates our chemical, the hormone and releases it into the bloodstream or the lymph system. And then that hormone travels over a very long distance, it circulates in our blood before it actually binds onto our target cell and affects that target cell in some way or form. So the endocrine system uses the endocrine signaling pathway.