The air pollution has become a global problem. It is only natural that members of Japan Broncho-esophagological Society should have special interest and concern in the battle against this particular hazzard.
In order to control and prevent the current hazzard it is necessary first to familiarize ourselves with the basic anatomical and ecological conditions of the air ways in different animalsas well as man.
The author reviews anatomy of the respiratory tract with special reference to airreservoirs which characterize certain animals such as some mammals, amphybians and birds. Attempts are being made to verify the advantages of those possessing the airrevervoir as against those which lack this structure, for example man, when exposed to locally polluted air.
