Functional residual capacity

Lung volumes

Functional residual capacity (FRC) is the volume of air present in the lungs at the end of passive expiration.[1] At FRC, the opposing elastic recoil forces of the lungs and chest wall are in equilibrium and there is no exertion by the diaphragm or other respiratory muscles.[1]

  1. ^ a b Hopkins E, Sharma S. Physiology, Functional Residual Capacity. [Updated 2022 Jan 4]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK500007/