The following videos from Khan Academy will provide you with a fundamental understanding of the skeletal  system.  The first video will present you with an overview of the skeletal structure and function, with the second video covering cartilage, and the third finishing off with a review of the importance of ligaments, tendons, and joints.  For more extensive information, please visit the Khan Academy Health & Medicine section where you will find a comprehensive playlist of videos, worksheets, and quizzes to help you to better understand your own anatomy and physiology.