Keywords: MuscleContractileUnit.jpg Diagram of muscle contractile unit including myosin fiber brown tubes and actin grey helix Transferred from http //en wikipedia org en wikipedia; transferred to Commons by User Kelly using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper 2005-03-10 Jag123 at http //en wikipedia org en wikipedia PD-AUTHOR; Released into the public domain by the author Jag123 Original upload log page en wikipedia MuscleContractileUnit jpg 2005-03-10 10 36 Jag123 813×293× 46728 bytes <nowiki>changing bridge orientation</nowiki> 2005-03-10 10 25 Jag123 813×293× 46533 bytes <nowiki> Jag123 </nowiki> Anatomy of the human musculoskeletal system |