This online text is a revision of the text "Basic Human Anatomy" which was published in 1983 by W.B. Saunders. Copyrights have reverted to Professor O'Rahilly who has been involved in the project to keep this resource available. The site is hosted at Dartmouth with his permission and with the support of the technical resources of Dartmouth Medical School and Dartmouth College. Particular thanks go to Sarah Horton from Web Publishing Services at Dartmouth College for assistance with the presentation of this work.