As the name suggests the "Basics of Respiratory Physiology" aims to provide the readers with the basic insight into the functions and regulatory mechanisms governing the respiratory system in a user friendly and easy to follow manner. It focuses on topics comprehensively and in a very lucid manner. It is suitable for undergraduate and postgraduate aspirants of various streams of biological sciences. Also, it may serve as a last minute revision book for the students and a quick reference for practicing physicians and scholars who are willing to have a quick brush up of the respiratory functions and regulatory mechanisms. The conceptual line diagrams and tables have also been incorporated to make the things more clear and interesting. The values for various variables have been approximated to the round figures so that the readers can remember the values easily.