Acland's Video Atlas of Human Anatomy - 3D anatomic specimens with brief review sections for testing your knowledge.
Hypermuscle: Muscles in Action - videos of various muscle movements with descriptions.
Muscular System Tutorial - Interactive site to practice identifying major superficial muscles.
Muscle Atlas - provided by the radiology department at Washington University. Contains clear illustrations of the musculoskeletal system - including origin, insertion, action, innervation and arterial supply for each muscle.
NeuroLogic Exam - A wealth of video demonstrations presenting anatomical foundations of the neurologic exam. Provides normal and abnormal conditions.
Physiopedia - wikipedia like resource containing articles, websites, and general information on a wide variety of topics relevant to physical therapy.
Skeleton Tutorials - Interactive site to practice identifying anatomical structures of the skeleton.