Sections are American Physiological Society (APS) Council-approved organizations composed of at least 100 regular Society members who share a common interest. Each member is asked to designate one primary section where they can vote and hold office. Members may affiliate with as many additional sections as they would like and there are no limits on the number of affiliations. There are currently 12 sections, each with their own internal governance as outlined in the APS Bylaws.

APS members may also affiliate with any or all of the Society’s eight interest groups. Interest groups are often subsets of sections created to bring together members working on very specific areas of research. Interest groups may also represent cross-sectional concepts such as translational research and the history of physiology.