Welcome to the Interdisciplinary Graduate Program in the Physiological Sciences. The purpose of this handbook is to introduce you to the various requirements that must be met before you are granted the Master of Science (M.S.), or Doctor of Philosophy (Ph.D.) degree from the Graduate College of The University of Arizona. The strength of the Physiological Sciences Program derives largely from the flexibility afforded by the interdisciplinary faculty who participate in the Program. This allows each student the freedom to design a unique program of study to meet individual career goals.