Muscle function: 1. contraction for locomotion and skeletal movement. 2. contraction for propulsion. 3. contraction for pressure regulation. Muscle classification: muscle tissue may be classified according to a morphological classification or a functional classification.ardiac muscle cells are not as long as skeletal muscles cells and often are branched cells. Cardiac muscle cells may be mononucleated or binucleated. In either case the nuclei are located centrally in the cell. Cardiac muscle is also striated.
1 A rheumatologist (if your back pain is caused by arthritis or other joint problem)  A physical therapist and/or occupational therapist (to help you learn to move and exercise in ways that don't worsen the pain but may improve it)
A visit to the GP is also helpful because back or neck pain can have a variety of different causes, ranging from muscle and skeletal injuries, to nerve disorders, to some organ diseases, like kidney disease. A GP can evaluate your symptoms, order diagnostic tests and determine what kind of specialist you need.