A long reflexive pathway has an advantage over a short reflexive pathway in the fact that they can be also be stimulated by the central nervous system, whereas the short reflexive pathway is only stimulated by the enteric nervous system.
Perhaps the answer your looking for is, a tumor suppressor gene.
Respiratory system= breathing system
To keep our Respiratory system healthy we should:
1- never breathe in front of polluted areas
2- never pollute our areas
3- try to make our environment normal
