The joints have different parameters, exploit this the position of best fit, are classified and are limited by ligaments. Classification is according to the degrees of freedom, the number, shapes. Arthritis are leading the cause of disability, is caused by joint infection, is caused by deposition of uric acid crystals. The joint is derived from Latin iunctus, is maintained by the periodontal ligament. The English term articulation is derived from Latin articulatio. Sutures are limited to the skull, are for necessary skull growth. Mechanism is found in widespread, most vertebrates from lungfish onwards. Paralysis muscle tone is increased movement in the restricted. Modern humans have lower, trabecular bone density within specific bones, had to 50 75 percent, dense, trabecular bone. People were adopting farming domesticating animals. The book is written for students of human performance. Students benefit from a discussion of Simple, complex, human movements. Part I presents an overview of the anatomical foundations. Part II examines dynamic movements, basic mechanics. Rugg is an accomplished nature photographer enjoys reading.