An Formal website of America authorities. Here is how you know we're Formal. dot gov icon Intelligent Vocabulary: linked words and phrases Substances & structures in the body abductor accessorius acetylcholine ACL ACTH folate follicular foramen foramen ovale fornix myocardium myofibril myofibrillar myofilament myology tegument temporomandibular tendinis tendinous tendinum https://www.youtube.com/watch?v=A07qHOeWON8