Download or read book Circadian Rhythms written by United States. Federal Aviation Administration. Library Services Division and published by . This book was released on 1968 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Ecological factors; Psychological factors; Physiological factors -- body chemistry, respiration, alimentation, heart-rate, temperature and other somatic responses; Work-rest cycle; Long distance flights; Medical aspects; Animal and plant studies.